1 /* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
2 Copyright 1999 Silicon Integrated System Corporation
3 Revision: 1.08.08 Jan. 22 2005
5 Modified from the driver which is originally written by Donald Becker.
7 This software may be used and distributed according to the terms
8 of the GNU General Public License (GPL), incorporated herein by reference.
9 Drivers based on this skeleton fall under the GPL and must retain
10 the authorship (implicit copyright) notice.
13 SiS 7016 Fast Ethernet PCI Bus 10/100 Mbps LAN Controller with OnNow Support,
14 preliminary Rev. 1.0 Jan. 14, 1998
15 SiS 900 Fast Ethernet PCI Bus 10/100 Mbps LAN Single Chip with OnNow Support,
16 preliminary Rev. 1.0 Nov. 10, 1998
17 SiS 7014 Single Chip 100BASE-TX/10BASE-T Physical Layer Solution,
18 preliminary Rev. 1.0 Jan. 18, 1998
20 Rev 1.08.08 Jan. 22 2005 Daniele Venzano use netif_msg for debugging messages
21 Rev 1.08.07 Nov. 2 2003 Daniele Venzano <webvenza@libero.it> add suspend/resume support
22 Rev 1.08.06 Sep. 24 2002 Mufasa Yang bug fix for Tx timeout & add SiS963 support
23 Rev 1.08.05 Jun. 6 2002 Mufasa Yang bug fix for read_eeprom & Tx descriptor over-boundary
24 Rev 1.08.04 Apr. 25 2002 Mufasa Yang <mufasa@sis.com.tw> added SiS962 support
25 Rev 1.08.03 Feb. 1 2002 Matt Domsch <Matt_Domsch@dell.com> update to use library crc32 function
26 Rev 1.08.02 Nov. 30 2001 Hui-Fen Hsu workaround for EDB & bug fix for dhcp problem
27 Rev 1.08.01 Aug. 25 2001 Hui-Fen Hsu update for 630ET & workaround for ICS1893 PHY
28 Rev 1.08.00 Jun. 11 2001 Hui-Fen Hsu workaround for RTL8201 PHY and some bug fix
29 Rev 1.07.11 Apr. 2 2001 Hui-Fen Hsu updates PCI drivers to use the new pci_set_dma_mask for kernel 2.4.3
30 Rev 1.07.10 Mar. 1 2001 Hui-Fen Hsu <hfhsu@sis.com.tw> some bug fix & 635M/B support
31 Rev 1.07.09 Feb. 9 2001 Dave Jones <davej@suse.de> PCI enable cleanup
32 Rev 1.07.08 Jan. 8 2001 Lei-Chun Chang added RTL8201 PHY support
33 Rev 1.07.07 Nov. 29 2000 Lei-Chun Chang added kernel-doc extractable documentation and 630 workaround fix
34 Rev 1.07.06 Nov. 7 2000 Jeff Garzik <jgarzik@pobox.com> some bug fix and cleaning
35 Rev 1.07.05 Nov. 6 2000 metapirat<metapirat@gmx.de> contribute media type select by ifconfig
36 Rev 1.07.04 Sep. 6 2000 Lei-Chun Chang added ICS1893 PHY support
37 Rev 1.07.03 Aug. 24 2000 Lei-Chun Chang (lcchang@sis.com.tw) modified 630E eqaulizer workaround rule
38 Rev 1.07.01 Aug. 08 2000 Ollie Lho minor update for SiS 630E and SiS 630E A1
39 Rev 1.07 Mar. 07 2000 Ollie Lho bug fix in Rx buffer ring
40 Rev 1.06.04 Feb. 11 2000 Jeff Garzik <jgarzik@pobox.com> softnet and init for kernel 2.4
41 Rev 1.06.03 Dec. 23 1999 Ollie Lho Third release
42 Rev 1.06.02 Nov. 23 1999 Ollie Lho bug in mac probing fixed
43 Rev 1.06.01 Nov. 16 1999 Ollie Lho CRC calculation provide by Joseph Zbiciak (im14u2c@primenet.com)
44 Rev 1.06 Nov. 4 1999 Ollie Lho (ollie@sis.com.tw) Second release
45 Rev 1.05.05 Oct. 29 1999 Ollie Lho (ollie@sis.com.tw) Single buffer Tx/Rx
46 Chin-Shan Li (lcs@sis.com.tw) Added AMD Am79c901 HomePNA PHY support
47 Rev 1.05 Aug. 7 1999 Jim Huang (cmhuang@sis.com.tw) Initial release
50 #include <linux/module.h>
51 #include <linux/moduleparam.h>
52 #include <linux/kernel.h>
53 #include <linux/string.h>
54 #include <linux/timer.h>
55 #include <linux/errno.h>
56 #include <linux/ioport.h>
57 #include <linux/slab.h>
58 #include <linux/interrupt.h>
59 #include <linux/pci.h>
60 #include <linux/netdevice.h>
61 #include <linux/init.h>
62 #include <linux/mii.h>
63 #include <linux/etherdevice.h>
64 #include <linux/skbuff.h>
65 #include <linux/delay.h>
66 #include <linux/ethtool.h>
67 #include <linux/crc32.h>
68 #include <linux/bitops.h>
69 #include <linux/dma-mapping.h>
71 #include <asm/processor.h> /* Processor type for cache alignment. */
74 #include <asm/uaccess.h> /* User space memory access functions */
78 #define SIS900_MODULE_NAME "sis900"
79 #define SIS900_DRV_VERSION "v1.08.08 Jan. 22 2005"
81 static char version[] __devinitdata =
82 KERN_INFO "sis900.c: " SIS900_DRV_VERSION "\n";
84 static int max_interrupt_work = 40;
85 static int multicast_filter_limit = 128;
87 static int sis900_debug = -1; /* Use SIS900_DEF_MSG as value */
89 #define SIS900_DEF_MSG \
95 /* Time in jiffies before concluding the transmitter is hung. */
96 #define TX_TIMEOUT (4*HZ)
102 static char * card_names[] = {
103 "SiS 900 PCI Fast Ethernet",
104 "SiS 7016 PCI Fast Ethernet"
106 static struct pci_device_id sis900_pci_tbl [] = {
107 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
108 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_900},
109 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
110 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7016},
113 MODULE_DEVICE_TABLE (pci, sis900_pci_tbl);
115 static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex);
117 static struct mii_chip_info {
126 } mii_chip_table[] = {
127 { "SiS 900 Internal MII PHY", 0x001d, 0x8000, LAN },
128 { "SiS 7014 Physical Layer Solution", 0x0016, 0xf830, LAN },
129 { "Altimata AC101LF PHY", 0x0022, 0x5520, LAN },
130 { "AMD 79C901 10BASE-T PHY", 0x0000, 0x6B70, LAN },
131 { "AMD 79C901 HomePNA PHY", 0x0000, 0x6B90, HOME},
132 { "ICS LAN PHY", 0x0015, 0xF440, LAN },
133 { "NS 83851 PHY", 0x2000, 0x5C20, MIX },
134 { "NS 83847 PHY", 0x2000, 0x5C30, MIX },
135 { "Realtek RTL8201 PHY", 0x0000, 0x8200, LAN },
136 { "VIA 6103 PHY", 0x0101, 0x8f20, LAN },
141 struct mii_phy * next;
149 typedef struct _BufferDesc {
155 struct sis900_private {
156 struct net_device_stats stats;
157 struct pci_dev * pci_dev;
161 struct mii_phy * mii;
162 struct mii_phy * first_mii; /* record the first mii structure */
163 unsigned int cur_phy;
164 struct mii_if_info mii_info;
166 struct timer_list timer; /* Link status detection timer. */
167 u8 autong_complete; /* 1: auto-negotiate complete */
171 unsigned int cur_rx, dirty_rx; /* producer/comsumer pointers for Tx/Rx ring */
172 unsigned int cur_tx, dirty_tx;
174 /* The saved address of a sent/receive-in-place packet buffer */
175 struct sk_buff *tx_skbuff[NUM_TX_DESC];
176 struct sk_buff *rx_skbuff[NUM_RX_DESC];
180 dma_addr_t tx_ring_dma;
181 dma_addr_t rx_ring_dma;
183 unsigned int tx_full; /* The Tx queue is full. */
188 MODULE_AUTHOR("Jim Huang <cmhuang@sis.com.tw>, Ollie Lho <ollie@sis.com.tw>");
189 MODULE_DESCRIPTION("SiS 900 PCI Fast Ethernet driver");
190 MODULE_LICENSE("GPL");
192 module_param(multicast_filter_limit, int, 0444);
193 module_param(max_interrupt_work, int, 0444);
194 module_param(sis900_debug, int, 0444);
195 MODULE_PARM_DESC(multicast_filter_limit, "SiS 900/7016 maximum number of filtered multicast addresses");
196 MODULE_PARM_DESC(max_interrupt_work, "SiS 900/7016 maximum events handled per interrupt");
197 MODULE_PARM_DESC(sis900_debug, "SiS 900/7016 bitmapped debugging message level");
199 #ifdef CONFIG_NET_POLL_CONTROLLER
200 static void sis900_poll(struct net_device *dev);
202 static int sis900_open(struct net_device *net_dev);
203 static int sis900_mii_probe (struct net_device * net_dev);
204 static void sis900_init_rxfilter (struct net_device * net_dev);
205 static u16 read_eeprom(long ioaddr, int location);
206 static int mdio_read(struct net_device *net_dev, int phy_id, int location);
207 static void mdio_write(struct net_device *net_dev, int phy_id, int location, int val);
208 static void sis900_timer(unsigned long data);
209 static void sis900_check_mode (struct net_device *net_dev, struct mii_phy *mii_phy);
210 static void sis900_tx_timeout(struct net_device *net_dev);
211 static void sis900_init_tx_ring(struct net_device *net_dev);
212 static void sis900_init_rx_ring(struct net_device *net_dev);
213 static int sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
214 static int sis900_rx(struct net_device *net_dev);
215 static void sis900_finish_xmit (struct net_device *net_dev);
216 static irqreturn_t sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
217 static int sis900_close(struct net_device *net_dev);
218 static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd);
219 static struct net_device_stats *sis900_get_stats(struct net_device *net_dev);
220 static u16 sis900_mcast_bitnr(u8 *addr, u8 revision);
221 static void set_rx_mode(struct net_device *net_dev);
222 static void sis900_reset(struct net_device *net_dev);
223 static void sis630_set_eq(struct net_device *net_dev, u8 revision);
224 static int sis900_set_config(struct net_device *dev, struct ifmap *map);
225 static u16 sis900_default_phy(struct net_device * net_dev);
226 static void sis900_set_capability( struct net_device *net_dev ,struct mii_phy *phy);
227 static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr);
228 static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr);
229 static void sis900_set_mode (long ioaddr, int speed, int duplex);
230 static struct ethtool_ops sis900_ethtool_ops;
233 * sis900_get_mac_addr - Get MAC address for stand alone SiS900 model
234 * @pci_dev: the sis900 pci device
235 * @net_dev: the net device to get address for
237 * Older SiS900 and friends, use EEPROM to store MAC address.
238 * MAC address is read from read_eeprom() into @net_dev->dev_addr.
241 static int __devinit sis900_get_mac_addr(struct pci_dev * pci_dev, struct net_device *net_dev)
243 long ioaddr = pci_resource_start(pci_dev, 0);
247 /* check to see if we have sane EEPROM */
248 signature = (u16) read_eeprom(ioaddr, EEPROMSignature);
249 if (signature == 0xffff || signature == 0x0000) {
250 printk (KERN_WARNING "%s: Error EERPOM read %x\n",
251 pci_name(pci_dev), signature);
255 /* get MAC address from EEPROM */
256 for (i = 0; i < 3; i++)
257 ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
263 * sis630e_get_mac_addr - Get MAC address for SiS630E model
264 * @pci_dev: the sis900 pci device
265 * @net_dev: the net device to get address for
267 * SiS630E model, use APC CMOS RAM to store MAC address.
268 * APC CMOS RAM is accessed through ISA bridge.
269 * MAC address is read into @net_dev->dev_addr.
272 static int __devinit sis630e_get_mac_addr(struct pci_dev * pci_dev,
273 struct net_device *net_dev)
275 struct pci_dev *isa_bridge = NULL;
279 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0008, isa_bridge);
281 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0018, isa_bridge);
283 printk(KERN_WARNING "%s: Can not find ISA bridge\n",
287 pci_read_config_byte(isa_bridge, 0x48, ®);
288 pci_write_config_byte(isa_bridge, 0x48, reg | 0x40);
290 for (i = 0; i < 6; i++) {
291 outb(0x09 + i, 0x70);
292 ((u8 *)(net_dev->dev_addr))[i] = inb(0x71);
294 pci_write_config_byte(isa_bridge, 0x48, reg & ~0x40);
295 pci_dev_put(isa_bridge);
302 * sis635_get_mac_addr - Get MAC address for SIS635 model
303 * @pci_dev: the sis900 pci device
304 * @net_dev: the net device to get address for
306 * SiS635 model, set MAC Reload Bit to load Mac address from APC
307 * to rfdr. rfdr is accessed through rfcr. MAC address is read into
308 * @net_dev->dev_addr.
311 static int __devinit sis635_get_mac_addr(struct pci_dev * pci_dev,
312 struct net_device *net_dev)
314 long ioaddr = net_dev->base_addr;
318 rfcrSave = inl(rfcr + ioaddr);
320 outl(rfcrSave | RELOAD, ioaddr + cr);
321 outl(0, ioaddr + cr);
323 /* disable packet filtering before setting filter */
324 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
326 /* load MAC addr to filter data register */
327 for (i = 0 ; i < 3 ; i++) {
328 outl((i << RFADDR_shift), ioaddr + rfcr);
329 *( ((u16 *)net_dev->dev_addr) + i) = inw(ioaddr + rfdr);
332 /* enable packet filtering */
333 outl(rfcrSave | RFEN, rfcr + ioaddr);
339 * sis96x_get_mac_addr - Get MAC address for SiS962 or SiS963 model
340 * @pci_dev: the sis900 pci device
341 * @net_dev: the net device to get address for
343 * SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
345 * LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
346 * and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
347 * by LAN, otherwise is not. After MAC address is read from EEPROM, send
348 * EEDONE signal to refuse EEPROM access by LAN.
349 * The EEPROM map of SiS962 or SiS963 is different to SiS900.
350 * The signature field in SiS962 or SiS963 spec is meaningless.
351 * MAC address is read into @net_dev->dev_addr.
354 static int __devinit sis96x_get_mac_addr(struct pci_dev * pci_dev,
355 struct net_device *net_dev)
357 long ioaddr = net_dev->base_addr;
358 long ee_addr = ioaddr + mear;
362 outl(EEREQ, ee_addr);
363 while(waittime < 2000) {
364 if(inl(ee_addr) & EEGNT) {
366 /* get MAC address from EEPROM */
367 for (i = 0; i < 3; i++)
368 ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
370 outl(EEDONE, ee_addr);
377 outl(EEDONE, ee_addr);
382 * sis900_probe - Probe for sis900 device
383 * @pci_dev: the sis900 pci device
384 * @pci_id: the pci device ID
386 * Check and probe sis900 net device for @pci_dev.
387 * Get mac address according to the chip revision,
388 * and assign SiS900-specific entries in the device structure.
389 * ie: sis900_open(), sis900_start_xmit(), sis900_close(), etc.
392 static int __devinit sis900_probe(struct pci_dev *pci_dev,
393 const struct pci_device_id *pci_id)
395 struct sis900_private *sis_priv;
396 struct net_device *net_dev;
402 char *card_name = card_names[pci_id->driver_data];
403 const char *dev_name = pci_name(pci_dev);
405 /* when built into the kernel, we only print version if device is found */
407 static int printed_version;
408 if (!printed_version++)
412 /* setup various bits in PCI command register */
413 ret = pci_enable_device(pci_dev);
416 i = pci_set_dma_mask(pci_dev, DMA_32BIT_MASK);
418 printk(KERN_ERR "sis900.c: architecture does not support"
419 "32bit PCI busmaster DMA\n");
423 pci_set_master(pci_dev);
425 net_dev = alloc_etherdev(sizeof(struct sis900_private));
428 SET_MODULE_OWNER(net_dev);
429 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
431 /* We do a request_region() to register /proc/ioports info. */
432 ioaddr = pci_resource_start(pci_dev, 0);
433 ret = pci_request_regions(pci_dev, "sis900");
437 sis_priv = net_dev->priv;
438 net_dev->base_addr = ioaddr;
439 net_dev->irq = pci_dev->irq;
440 sis_priv->pci_dev = pci_dev;
441 spin_lock_init(&sis_priv->lock);
443 pci_set_drvdata(pci_dev, net_dev);
445 ring_space = pci_alloc_consistent(pci_dev, TX_TOTAL_SIZE, &ring_dma);
448 goto err_out_cleardev;
450 sis_priv->tx_ring = (BufferDesc *)ring_space;
451 sis_priv->tx_ring_dma = ring_dma;
453 ring_space = pci_alloc_consistent(pci_dev, RX_TOTAL_SIZE, &ring_dma);
458 sis_priv->rx_ring = (BufferDesc *)ring_space;
459 sis_priv->rx_ring_dma = ring_dma;
461 /* The SiS900-specific entries in the device structure. */
462 net_dev->open = &sis900_open;
463 net_dev->hard_start_xmit = &sis900_start_xmit;
464 net_dev->stop = &sis900_close;
465 net_dev->get_stats = &sis900_get_stats;
466 net_dev->set_config = &sis900_set_config;
467 net_dev->set_multicast_list = &set_rx_mode;
468 net_dev->do_ioctl = &mii_ioctl;
469 net_dev->tx_timeout = sis900_tx_timeout;
470 net_dev->watchdog_timeo = TX_TIMEOUT;
471 net_dev->ethtool_ops = &sis900_ethtool_ops;
473 #ifdef CONFIG_NET_POLL_CONTROLLER
474 net_dev->poll_controller = &sis900_poll;
477 if (sis900_debug > 0)
478 sis_priv->msg_enable = sis900_debug;
480 sis_priv->msg_enable = SIS900_DEF_MSG;
482 sis_priv->mii_info.dev = net_dev;
483 sis_priv->mii_info.mdio_read = mdio_read;
484 sis_priv->mii_info.mdio_write = mdio_write;
485 sis_priv->mii_info.phy_id_mask = 0x1f;
486 sis_priv->mii_info.reg_num_mask = 0x1f;
488 /* Get Mac address according to the chip revision */
489 pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &(sis_priv->chipset_rev));
490 if(netif_msg_probe(sis_priv))
491 printk(KERN_DEBUG "%s: detected revision %2.2x, "
492 "trying to get MAC address...\n",
493 dev_name, sis_priv->chipset_rev);
496 if (sis_priv->chipset_rev == SIS630E_900_REV)
497 ret = sis630e_get_mac_addr(pci_dev, net_dev);
498 else if ((sis_priv->chipset_rev > 0x81) && (sis_priv->chipset_rev <= 0x90) )
499 ret = sis635_get_mac_addr(pci_dev, net_dev);
500 else if (sis_priv->chipset_rev == SIS96x_900_REV)
501 ret = sis96x_get_mac_addr(pci_dev, net_dev);
503 ret = sis900_get_mac_addr(pci_dev, net_dev);
506 printk(KERN_WARNING "%s: Cannot read MAC address.\n", dev_name);
511 /* 630ET : set the mii access mode as software-mode */
512 if (sis_priv->chipset_rev == SIS630ET_900_REV)
513 outl(ACCESSMODE | inl(ioaddr + cr), ioaddr + cr);
515 /* probe for mii transceiver */
516 if (sis900_mii_probe(net_dev) == 0) {
517 printk(KERN_WARNING "%s: Error probing MII device.\n",
523 /* save our host bridge revision */
524 dev = pci_get_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_630, NULL);
526 pci_read_config_byte(dev, PCI_CLASS_REVISION, &sis_priv->host_bridge_rev);
530 ret = register_netdev(net_dev);
534 /* print some information about our NIC */
535 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ", net_dev->name,
536 card_name, ioaddr, net_dev->irq);
537 for (i = 0; i < 5; i++)
538 printk("%2.2x:", (u8)net_dev->dev_addr[i]);
539 printk("%2.2x.\n", net_dev->dev_addr[i]);
544 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
545 sis_priv->rx_ring_dma);
547 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
548 sis_priv->tx_ring_dma);
550 pci_set_drvdata(pci_dev, NULL);
551 pci_release_regions(pci_dev);
553 free_netdev(net_dev);
558 * sis900_mii_probe - Probe MII PHY for sis900
559 * @net_dev: the net device to probe for
561 * Search for total of 32 possible mii phy addresses.
562 * Identify and set current phy if found one,
563 * return error if it failed to found.
566 static int __init sis900_mii_probe(struct net_device * net_dev)
568 struct sis900_private * sis_priv = net_dev->priv;
569 const char *dev_name = pci_name(sis_priv->pci_dev);
570 u16 poll_bit = MII_STAT_LINK, status = 0;
571 unsigned long timeout = jiffies + 5 * HZ;
574 sis_priv->mii = NULL;
576 /* search for total of 32 possible mii phy addresses */
577 for (phy_addr = 0; phy_addr < 32; phy_addr++) {
578 struct mii_phy * mii_phy = NULL;
583 for(i = 0; i < 2; i++)
584 mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
586 if (mii_status == 0xffff || mii_status == 0x0000) {
587 if (netif_msg_probe(sis_priv))
588 printk(KERN_DEBUG "%s: MII at address %d"
594 if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
595 printk(KERN_WARNING "Cannot allocate mem for struct mii_phy\n");
596 mii_phy = sis_priv->first_mii;
600 mii_phy = mii_phy->next;
606 mii_phy->phy_id0 = mdio_read(net_dev, phy_addr, MII_PHY_ID0);
607 mii_phy->phy_id1 = mdio_read(net_dev, phy_addr, MII_PHY_ID1);
608 mii_phy->phy_addr = phy_addr;
609 mii_phy->status = mii_status;
610 mii_phy->next = sis_priv->mii;
611 sis_priv->mii = mii_phy;
612 sis_priv->first_mii = mii_phy;
614 for (i = 0; mii_chip_table[i].phy_id1; i++)
615 if ((mii_phy->phy_id0 == mii_chip_table[i].phy_id0 ) &&
616 ((mii_phy->phy_id1 & 0xFFF0) == mii_chip_table[i].phy_id1)){
617 mii_phy->phy_types = mii_chip_table[i].phy_types;
618 if (mii_chip_table[i].phy_types == MIX)
620 (mii_status & (MII_STAT_CAN_TX_FDX | MII_STAT_CAN_TX)) ? LAN : HOME;
621 printk(KERN_INFO "%s: %s transceiver found "
624 mii_chip_table[i].name,
629 if( !mii_chip_table[i].phy_id1 ) {
630 printk(KERN_INFO "%s: Unknown PHY transceiver found at address %d.\n",
632 mii_phy->phy_types = UNKNOWN;
636 if (sis_priv->mii == NULL) {
637 printk(KERN_INFO "%s: No MII transceivers found!\n", dev_name);
641 /* select default PHY for mac */
642 sis_priv->mii = NULL;
643 sis900_default_phy( net_dev );
645 /* Reset phy if default phy is internal sis900 */
646 if ((sis_priv->mii->phy_id0 == 0x001D) &&
647 ((sis_priv->mii->phy_id1&0xFFF0) == 0x8000))
648 status = sis900_reset_phy(net_dev, sis_priv->cur_phy);
650 /* workaround for ICS1893 PHY */
651 if ((sis_priv->mii->phy_id0 == 0x0015) &&
652 ((sis_priv->mii->phy_id1&0xFFF0) == 0xF440))
653 mdio_write(net_dev, sis_priv->cur_phy, 0x0018, 0xD200);
655 if(status & MII_STAT_LINK){
659 poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
660 if (time_after_eq(jiffies, timeout)) {
661 printk(KERN_WARNING "%s: reset phy and link down now\n",
668 if (sis_priv->chipset_rev == SIS630E_900_REV) {
669 /* SiS 630E has some bugs on default value of PHY registers */
670 mdio_write(net_dev, sis_priv->cur_phy, MII_ANADV, 0x05e1);
671 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG1, 0x22);
672 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG2, 0xff00);
673 mdio_write(net_dev, sis_priv->cur_phy, MII_MASK, 0xffc0);
674 //mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, 0x1000);
677 if (sis_priv->mii->status & MII_STAT_LINK)
678 netif_carrier_on(net_dev);
680 netif_carrier_off(net_dev);
686 * sis900_default_phy - Select default PHY for sis900 mac.
687 * @net_dev: the net device to probe for
689 * Select first detected PHY with link as default.
690 * If no one is link on, select PHY whose types is HOME as default.
691 * If HOME doesn't exist, select LAN.
694 static u16 sis900_default_phy(struct net_device * net_dev)
696 struct sis900_private * sis_priv = net_dev->priv;
697 struct mii_phy *phy = NULL, *phy_home = NULL,
698 *default_phy = NULL, *phy_lan = NULL;
701 for (phy=sis_priv->first_mii; phy; phy=phy->next) {
702 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
703 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
705 /* Link ON & Not select default PHY & not ghost PHY */
706 if ((status & MII_STAT_LINK) && !default_phy &&
707 (phy->phy_types != UNKNOWN))
710 status = mdio_read(net_dev, phy->phy_addr, MII_CONTROL);
711 mdio_write(net_dev, phy->phy_addr, MII_CONTROL,
712 status | MII_CNTL_AUTO | MII_CNTL_ISOLATE);
713 if (phy->phy_types == HOME)
715 else if(phy->phy_types == LAN)
720 if (!default_phy && phy_home)
721 default_phy = phy_home;
722 else if (!default_phy && phy_lan)
723 default_phy = phy_lan;
724 else if (!default_phy)
725 default_phy = sis_priv->first_mii;
727 if (sis_priv->mii != default_phy) {
728 sis_priv->mii = default_phy;
729 sis_priv->cur_phy = default_phy->phy_addr;
730 printk(KERN_INFO "%s: Using transceiver found at address %d as default\n",
731 pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
734 sis_priv->mii_info.phy_id = sis_priv->cur_phy;
736 status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
737 status &= (~MII_CNTL_ISOLATE);
739 mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, status);
740 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
741 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
748 * sis900_set_capability - set the media capability of network adapter.
749 * @net_dev : the net device to probe for
752 * Set the media capability of network adapter according to
753 * mii status register. It's necessary before auto-negotiate.
756 static void sis900_set_capability(struct net_device *net_dev, struct mii_phy *phy)
761 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
762 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
764 cap = MII_NWAY_CSMA_CD |
765 ((phy->status & MII_STAT_CAN_TX_FDX)? MII_NWAY_TX_FDX:0) |
766 ((phy->status & MII_STAT_CAN_TX) ? MII_NWAY_TX:0) |
767 ((phy->status & MII_STAT_CAN_T_FDX) ? MII_NWAY_T_FDX:0)|
768 ((phy->status & MII_STAT_CAN_T) ? MII_NWAY_T:0);
770 mdio_write(net_dev, phy->phy_addr, MII_ANADV, cap);
774 /* Delay between EEPROM clock transitions. */
775 #define eeprom_delay() inl(ee_addr)
778 * read_eeprom - Read Serial EEPROM
779 * @ioaddr: base i/o address
780 * @location: the EEPROM location to read
782 * Read Serial EEPROM through EEPROM Access Register.
783 * Note that location is in word (16 bits) unit
786 static u16 __devinit read_eeprom(long ioaddr, int location)
790 long ee_addr = ioaddr + mear;
791 u32 read_cmd = location | EEread;
798 /* Shift the read command (9) bits out. */
799 for (i = 8; i >= 0; i--) {
800 u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
801 outl(dataval, ee_addr);
803 outl(dataval | EECLK, ee_addr);
809 /* read the 16-bits data in */
810 for (i = 16; i > 0; i--) {
813 outl(EECS | EECLK, ee_addr);
815 retval = (retval << 1) | ((inl(ee_addr) & EEDO) ? 1 : 0);
819 /* Terminate the EEPROM access. */
826 /* Read and write the MII management registers using software-generated
827 serial MDIO protocol. Note that the command bits and data bits are
828 send out separately */
829 #define mdio_delay() inl(mdio_addr)
831 static void mdio_idle(long mdio_addr)
833 outl(MDIO | MDDIR, mdio_addr);
835 outl(MDIO | MDDIR | MDC, mdio_addr);
838 /* Syncronize the MII management interface by shifting 32 one bits out. */
839 static void mdio_reset(long mdio_addr)
843 for (i = 31; i >= 0; i--) {
844 outl(MDDIR | MDIO, mdio_addr);
846 outl(MDDIR | MDIO | MDC, mdio_addr);
853 * mdio_read - read MII PHY register
854 * @net_dev: the net device to read
855 * @phy_id: the phy address to read
856 * @location: the phy regiester id to read
858 * Read MII registers through MDIO and MDC
859 * using MDIO management frame structure and protocol(defined by ISO/IEC).
860 * Please see SiS7014 or ICS spec
863 static int mdio_read(struct net_device *net_dev, int phy_id, int location)
865 long mdio_addr = net_dev->base_addr + mear;
866 int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
870 mdio_reset(mdio_addr);
871 mdio_idle(mdio_addr);
873 for (i = 15; i >= 0; i--) {
874 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
875 outl(dataval, mdio_addr);
877 outl(dataval | MDC, mdio_addr);
881 /* Read the 16 data bits. */
882 for (i = 16; i > 0; i--) {
885 retval = (retval << 1) | ((inl(mdio_addr) & MDIO) ? 1 : 0);
886 outl(MDC, mdio_addr);
889 outl(0x00, mdio_addr);
895 * mdio_write - write MII PHY register
896 * @net_dev: the net device to write
897 * @phy_id: the phy address to write
898 * @location: the phy regiester id to write
899 * @value: the register value to write with
901 * Write MII registers with @value through MDIO and MDC
902 * using MDIO management frame structure and protocol(defined by ISO/IEC)
903 * please see SiS7014 or ICS spec
906 static void mdio_write(struct net_device *net_dev, int phy_id, int location,
909 long mdio_addr = net_dev->base_addr + mear;
910 int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
913 mdio_reset(mdio_addr);
914 mdio_idle(mdio_addr);
916 /* Shift the command bits out. */
917 for (i = 15; i >= 0; i--) {
918 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
919 outb(dataval, mdio_addr);
921 outb(dataval | MDC, mdio_addr);
926 /* Shift the value bits out. */
927 for (i = 15; i >= 0; i--) {
928 int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
929 outl(dataval, mdio_addr);
931 outl(dataval | MDC, mdio_addr);
936 /* Clear out extra bits. */
937 for (i = 2; i > 0; i--) {
940 outb(MDC, mdio_addr);
943 outl(0x00, mdio_addr);
950 * sis900_reset_phy - reset sis900 mii phy.
951 * @net_dev: the net device to write
952 * @phy_addr: default phy address
954 * Some specific phy can't work properly without reset.
955 * This function will be called during initialization and
956 * link status change from ON to DOWN.
959 static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
965 status = mdio_read(net_dev, phy_addr, MII_STATUS);
967 mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
972 #ifdef CONFIG_NET_POLL_CONTROLLER
974 * Polling 'interrupt' - used by things like netconsole to send skbs
975 * without having to re-enable interrupts. It's not called while
976 * the interrupt routine is executing.
978 static void sis900_poll(struct net_device *dev)
980 disable_irq(dev->irq);
981 sis900_interrupt(dev->irq, dev, NULL);
982 enable_irq(dev->irq);
987 * sis900_open - open sis900 device
988 * @net_dev: the net device to open
990 * Do some initialization and start net interface.
991 * enable interrupts and set sis900 timer.
995 sis900_open(struct net_device *net_dev)
997 struct sis900_private *sis_priv = net_dev->priv;
998 long ioaddr = net_dev->base_addr;
1001 /* Soft reset the chip. */
1002 sis900_reset(net_dev);
1004 /* Equalizer workaround Rule */
1005 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1007 ret = request_irq(net_dev->irq, &sis900_interrupt, SA_SHIRQ,
1008 net_dev->name, net_dev);
1012 sis900_init_rxfilter(net_dev);
1014 sis900_init_tx_ring(net_dev);
1015 sis900_init_rx_ring(net_dev);
1017 set_rx_mode(net_dev);
1019 netif_start_queue(net_dev);
1021 /* Workaround for EDB */
1022 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
1024 /* Enable all known interrupts by setting the interrupt mask. */
1025 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1026 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
1027 outl(IE, ioaddr + ier);
1029 sis900_check_mode(net_dev, sis_priv->mii);
1031 /* Set the timer to switch to check for link beat and perhaps switch
1032 to an alternate media type. */
1033 init_timer(&sis_priv->timer);
1034 sis_priv->timer.expires = jiffies + HZ;
1035 sis_priv->timer.data = (unsigned long)net_dev;
1036 sis_priv->timer.function = &sis900_timer;
1037 add_timer(&sis_priv->timer);
1043 * sis900_init_rxfilter - Initialize the Rx filter
1044 * @net_dev: the net device to initialize for
1046 * Set receive filter address to our MAC address
1047 * and enable packet filtering.
1051 sis900_init_rxfilter (struct net_device * net_dev)
1053 struct sis900_private *sis_priv = net_dev->priv;
1054 long ioaddr = net_dev->base_addr;
1058 rfcrSave = inl(rfcr + ioaddr);
1060 /* disable packet filtering before setting filter */
1061 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
1063 /* load MAC addr to filter data register */
1064 for (i = 0 ; i < 3 ; i++) {
1067 w = (u32) *((u16 *)(net_dev->dev_addr)+i);
1068 outl((i << RFADDR_shift), ioaddr + rfcr);
1069 outl(w, ioaddr + rfdr);
1071 if (netif_msg_hw(sis_priv)) {
1072 printk(KERN_DEBUG "%s: Receive Filter Addrss[%d]=%x\n",
1073 net_dev->name, i, inl(ioaddr + rfdr));
1077 /* enable packet filtering */
1078 outl(rfcrSave | RFEN, rfcr + ioaddr);
1082 * sis900_init_tx_ring - Initialize the Tx descriptor ring
1083 * @net_dev: the net device to initialize for
1085 * Initialize the Tx descriptor ring,
1089 sis900_init_tx_ring(struct net_device *net_dev)
1091 struct sis900_private *sis_priv = net_dev->priv;
1092 long ioaddr = net_dev->base_addr;
1095 sis_priv->tx_full = 0;
1096 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1098 for (i = 0; i < NUM_TX_DESC; i++) {
1099 sis_priv->tx_skbuff[i] = NULL;
1101 sis_priv->tx_ring[i].link = sis_priv->tx_ring_dma +
1102 ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
1103 sis_priv->tx_ring[i].cmdsts = 0;
1104 sis_priv->tx_ring[i].bufptr = 0;
1107 /* load Transmit Descriptor Register */
1108 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1109 if (netif_msg_hw(sis_priv))
1110 printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
1111 net_dev->name, inl(ioaddr + txdp));
1115 * sis900_init_rx_ring - Initialize the Rx descriptor ring
1116 * @net_dev: the net device to initialize for
1118 * Initialize the Rx descriptor ring,
1119 * and pre-allocate recevie buffers (socket buffer)
1123 sis900_init_rx_ring(struct net_device *net_dev)
1125 struct sis900_private *sis_priv = net_dev->priv;
1126 long ioaddr = net_dev->base_addr;
1129 sis_priv->cur_rx = 0;
1130 sis_priv->dirty_rx = 0;
1132 /* init RX descriptor */
1133 for (i = 0; i < NUM_RX_DESC; i++) {
1134 sis_priv->rx_skbuff[i] = NULL;
1136 sis_priv->rx_ring[i].link = sis_priv->rx_ring_dma +
1137 ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
1138 sis_priv->rx_ring[i].cmdsts = 0;
1139 sis_priv->rx_ring[i].bufptr = 0;
1142 /* allocate sock buffers */
1143 for (i = 0; i < NUM_RX_DESC; i++) {
1144 struct sk_buff *skb;
1146 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1147 /* not enough memory for skbuff, this makes a "hole"
1148 on the buffer ring, it is not clear how the
1149 hardware will react to this kind of degenerated
1154 sis_priv->rx_skbuff[i] = skb;
1155 sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
1156 sis_priv->rx_ring[i].bufptr = pci_map_single(sis_priv->pci_dev,
1157 skb->data, RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1159 sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
1161 /* load Receive Descriptor Register */
1162 outl(sis_priv->rx_ring_dma, ioaddr + rxdp);
1163 if (netif_msg_hw(sis_priv))
1164 printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
1165 net_dev->name, inl(ioaddr + rxdp));
1169 * sis630_set_eq - set phy equalizer value for 630 LAN
1170 * @net_dev: the net device to set equalizer value
1171 * @revision: 630 LAN revision number
1173 * 630E equalizer workaround rule(Cyrus Huang 08/15)
1174 * PHY register 14h(Test)
1175 * Bit 14: 0 -- Automatically dectect (default)
1176 * 1 -- Manually set Equalizer filter
1177 * Bit 13: 0 -- (Default)
1178 * 1 -- Speed up convergence of equalizer setting
1179 * Bit 9 : 0 -- (Default)
1180 * 1 -- Disable Baseline Wander
1181 * Bit 3~7 -- Equalizer filter setting
1182 * Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
1183 * Then calculate equalizer value
1184 * Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
1185 * Link Off:Set Bit 13 to 1, Bit 14 to 0
1186 * Calculate Equalizer value:
1187 * When Link is ON and Bit 14 is 0, SIS900PHY will auto-dectect proper equalizer value.
1188 * When the equalizer is stable, this value is not a fixed value. It will be within
1189 * a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
1190 * 0 <= max <= 4 --> set equalizer to max
1191 * 5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
1192 * max >= 15 --> set equalizer to max+5 or set equalizer to max+6 if max == min
1195 static void sis630_set_eq(struct net_device *net_dev, u8 revision)
1197 struct sis900_private *sis_priv = net_dev->priv;
1198 u16 reg14h, eq_value=0, max_value=0, min_value=0;
1201 if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1202 revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
1205 if (netif_carrier_ok(net_dev)) {
1206 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1207 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1208 (0x2200 | reg14h) & 0xBFFF);
1209 for (i=0; i < maxcount; i++) {
1210 eq_value = (0x00F8 & mdio_read(net_dev,
1211 sis_priv->cur_phy, MII_RESV)) >> 3;
1213 max_value=min_value=eq_value;
1214 max_value = (eq_value > max_value) ?
1215 eq_value : max_value;
1216 min_value = (eq_value < min_value) ?
1217 eq_value : min_value;
1219 /* 630E rule to determine the equalizer value */
1220 if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1221 revision == SIS630ET_900_REV) {
1223 eq_value = max_value;
1224 else if (max_value >= 5 && max_value < 15)
1225 eq_value = (max_value == min_value) ?
1226 max_value+2 : max_value+1;
1227 else if (max_value >= 15)
1228 eq_value=(max_value == min_value) ?
1229 max_value+6 : max_value+5;
1231 /* 630B0&B1 rule to determine the equalizer value */
1232 if (revision == SIS630A_900_REV &&
1233 (sis_priv->host_bridge_rev == SIS630B0 ||
1234 sis_priv->host_bridge_rev == SIS630B1)) {
1238 eq_value = (max_value + min_value + 1)/2;
1240 /* write equalizer value and setting */
1241 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1242 reg14h = (reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
1243 reg14h = (reg14h | 0x6000) & 0xFDFF;
1244 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
1246 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1247 if (revision == SIS630A_900_REV &&
1248 (sis_priv->host_bridge_rev == SIS630B0 ||
1249 sis_priv->host_bridge_rev == SIS630B1))
1250 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1251 (reg14h | 0x2200) & 0xBFFF);
1253 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1254 (reg14h | 0x2000) & 0xBFFF);
1260 * sis900_timer - sis900 timer routine
1261 * @data: pointer to sis900 net device
1263 * On each timer ticks we check two things,
1264 * link status (ON/OFF) and link mode (10/100/Full/Half)
1267 static void sis900_timer(unsigned long data)
1269 struct net_device *net_dev = (struct net_device *)data;
1270 struct sis900_private *sis_priv = net_dev->priv;
1271 struct mii_phy *mii_phy = sis_priv->mii;
1272 static int next_tick = 5*HZ;
1275 if (!sis_priv->autong_complete){
1276 int speed, duplex = 0;
1278 sis900_read_mode(net_dev, &speed, &duplex);
1280 sis900_set_mode(net_dev->base_addr, speed, duplex);
1281 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1282 netif_start_queue(net_dev);
1285 sis_priv->timer.expires = jiffies + HZ;
1286 add_timer(&sis_priv->timer);
1290 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1291 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1293 /* Link OFF -> ON */
1294 if (!netif_carrier_ok(net_dev)) {
1296 /* Search for new PHY */
1297 status = sis900_default_phy(net_dev);
1298 mii_phy = sis_priv->mii;
1300 if (status & MII_STAT_LINK){
1301 sis900_check_mode(net_dev, mii_phy);
1302 netif_carrier_on(net_dev);
1305 /* Link ON -> OFF */
1306 if (!(status & MII_STAT_LINK)){
1307 netif_carrier_off(net_dev);
1308 if(netif_msg_link(sis_priv))
1309 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1311 /* Change mode issue */
1312 if ((mii_phy->phy_id0 == 0x001D) &&
1313 ((mii_phy->phy_id1 & 0xFFF0) == 0x8000))
1314 sis900_reset_phy(net_dev, sis_priv->cur_phy);
1316 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1322 sis_priv->timer.expires = jiffies + next_tick;
1323 add_timer(&sis_priv->timer);
1327 * sis900_check_mode - check the media mode for sis900
1328 * @net_dev: the net device to be checked
1329 * @mii_phy: the mii phy
1331 * Older driver gets the media mode from mii status output
1332 * register. Now we set our media capability and auto-negotiate
1333 * to get the upper bound of speed and duplex between two ends.
1334 * If the types of mii phy is HOME, it doesn't need to auto-negotiate
1335 * and autong_complete should be set to 1.
1338 static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
1340 struct sis900_private *sis_priv = net_dev->priv;
1341 long ioaddr = net_dev->base_addr;
1344 if (mii_phy->phy_types == LAN) {
1345 outl(~EXD & inl(ioaddr + cfg), ioaddr + cfg);
1346 sis900_set_capability(net_dev , mii_phy);
1347 sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
1349 outl(EXD | inl(ioaddr + cfg), ioaddr + cfg);
1350 speed = HW_SPEED_HOME;
1351 duplex = FDX_CAPABLE_HALF_SELECTED;
1352 sis900_set_mode(ioaddr, speed, duplex);
1353 sis_priv->autong_complete = 1;
1358 * sis900_set_mode - Set the media mode of mac register.
1359 * @ioaddr: the address of the device
1360 * @speed : the transmit speed to be determined
1361 * @duplex: the duplex mode to be determined
1363 * Set the media mode of mac register txcfg/rxcfg according to
1364 * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
1365 * bus is used instead of PCI bus. When this bit is set 1, the
1366 * Max DMA Burst Size for TX/RX DMA should be no larger than 16
1370 static void sis900_set_mode (long ioaddr, int speed, int duplex)
1372 u32 tx_flags = 0, rx_flags = 0;
1374 if (inl(ioaddr + cfg) & EDB_MASTER_EN) {
1375 tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) |
1376 (TX_FILL_THRESH << TxFILLT_shift);
1377 rx_flags = DMA_BURST_64 << RxMXDMA_shift;
1379 tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) |
1380 (TX_FILL_THRESH << TxFILLT_shift);
1381 rx_flags = DMA_BURST_512 << RxMXDMA_shift;
1384 if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS) {
1385 rx_flags |= (RxDRNT_10 << RxDRNT_shift);
1386 tx_flags |= (TxDRNT_10 << TxDRNT_shift);
1388 rx_flags |= (RxDRNT_100 << RxDRNT_shift);
1389 tx_flags |= (TxDRNT_100 << TxDRNT_shift);
1392 if (duplex == FDX_CAPABLE_FULL_SELECTED) {
1393 tx_flags |= (TxCSI | TxHBI);
1397 outl (tx_flags, ioaddr + txcfg);
1398 outl (rx_flags, ioaddr + rxcfg);
1402 * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
1403 * @net_dev: the net device to read mode for
1404 * @phy_addr: mii phy address
1406 * If the adapter is link-on, set the auto-negotiate enable/reset bit.
1407 * autong_complete should be set to 0 when starting auto-negotiation.
1408 * autong_complete should be set to 1 if we didn't start auto-negotiation.
1409 * sis900_timer will wait for link on again if autong_complete = 0.
1412 static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
1414 struct sis900_private *sis_priv = net_dev->priv;
1419 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1421 if (!(status & MII_STAT_LINK)){
1422 if(netif_msg_link(sis_priv))
1423 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1424 sis_priv->autong_complete = 1;
1425 netif_carrier_off(net_dev);
1429 /* (Re)start AutoNegotiate */
1430 mdio_write(net_dev, phy_addr, MII_CONTROL,
1431 MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
1432 sis_priv->autong_complete = 0;
1437 * sis900_read_mode - read media mode for sis900 internal phy
1438 * @net_dev: the net device to read mode for
1439 * @speed : the transmit speed to be determined
1440 * @duplex : the duplex mode to be determined
1442 * The capability of remote end will be put in mii register autorec
1443 * after auto-negotiation. Use AND operation to get the upper bound
1444 * of speed and duplex between two ends.
1447 static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
1449 struct sis900_private *sis_priv = net_dev->priv;
1450 struct mii_phy *phy = sis_priv->mii;
1451 int phy_addr = sis_priv->cur_phy;
1453 u16 autoadv, autorec;
1457 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1459 if (!(status & MII_STAT_LINK))
1462 /* AutoNegotiate completed */
1463 autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
1464 autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
1465 status = autoadv & autorec;
1467 *speed = HW_SPEED_10_MBPS;
1468 *duplex = FDX_CAPABLE_HALF_SELECTED;
1470 if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
1471 *speed = HW_SPEED_100_MBPS;
1472 if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
1473 *duplex = FDX_CAPABLE_FULL_SELECTED;
1475 sis_priv->autong_complete = 1;
1477 /* Workaround for Realtek RTL8201 PHY issue */
1478 if ((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)) {
1479 if (mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
1480 *duplex = FDX_CAPABLE_FULL_SELECTED;
1481 if (mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
1482 *speed = HW_SPEED_100_MBPS;
1485 if(netif_msg_link(sis_priv))
1486 printk(KERN_INFO "%s: Media Link On %s %s-duplex \n",
1488 *speed == HW_SPEED_100_MBPS ?
1489 "100mbps" : "10mbps",
1490 *duplex == FDX_CAPABLE_FULL_SELECTED ?
1495 * sis900_tx_timeout - sis900 transmit timeout routine
1496 * @net_dev: the net device to transmit
1498 * print transmit timeout status
1499 * disable interrupts and do some tasks
1502 static void sis900_tx_timeout(struct net_device *net_dev)
1504 struct sis900_private *sis_priv = net_dev->priv;
1505 long ioaddr = net_dev->base_addr;
1506 unsigned long flags;
1509 if(netif_msg_tx_err(sis_priv))
1510 printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x \n",
1511 net_dev->name, inl(ioaddr + cr), inl(ioaddr + isr));
1513 /* Disable interrupts by clearing the interrupt mask. */
1514 outl(0x0000, ioaddr + imr);
1516 /* use spinlock to prevent interrupt handler accessing buffer ring */
1517 spin_lock_irqsave(&sis_priv->lock, flags);
1519 /* discard unsent packets */
1520 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1521 for (i = 0; i < NUM_TX_DESC; i++) {
1522 struct sk_buff *skb = sis_priv->tx_skbuff[i];
1525 pci_unmap_single(sis_priv->pci_dev,
1526 sis_priv->tx_ring[i].bufptr, skb->len,
1528 dev_kfree_skb_irq(skb);
1529 sis_priv->tx_skbuff[i] = NULL;
1530 sis_priv->tx_ring[i].cmdsts = 0;
1531 sis_priv->tx_ring[i].bufptr = 0;
1532 sis_priv->stats.tx_dropped++;
1535 sis_priv->tx_full = 0;
1536 netif_wake_queue(net_dev);
1538 spin_unlock_irqrestore(&sis_priv->lock, flags);
1540 net_dev->trans_start = jiffies;
1542 /* load Transmit Descriptor Register */
1543 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1545 /* Enable all known interrupts by setting the interrupt mask. */
1546 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1551 * sis900_start_xmit - sis900 start transmit routine
1552 * @skb: socket buffer pointer to put the data being transmitted
1553 * @net_dev: the net device to transmit with
1555 * Set the transmit buffer descriptor,
1556 * and write TxENA to enable transmit state machine.
1557 * tell upper layer if the buffer is full
1561 sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
1563 struct sis900_private *sis_priv = net_dev->priv;
1564 long ioaddr = net_dev->base_addr;
1566 unsigned long flags;
1567 unsigned int index_cur_tx, index_dirty_tx;
1568 unsigned int count_dirty_tx;
1570 /* Don't transmit data before the complete of auto-negotiation */
1571 if(!sis_priv->autong_complete){
1572 netif_stop_queue(net_dev);
1576 spin_lock_irqsave(&sis_priv->lock, flags);
1578 /* Calculate the next Tx descriptor entry. */
1579 entry = sis_priv->cur_tx % NUM_TX_DESC;
1580 sis_priv->tx_skbuff[entry] = skb;
1582 /* set the transmit buffer descriptor and enable Transmit State Machine */
1583 sis_priv->tx_ring[entry].bufptr = pci_map_single(sis_priv->pci_dev,
1584 skb->data, skb->len, PCI_DMA_TODEVICE);
1585 sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
1586 outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
1588 sis_priv->cur_tx ++;
1589 index_cur_tx = sis_priv->cur_tx;
1590 index_dirty_tx = sis_priv->dirty_tx;
1592 for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
1595 if (index_cur_tx == index_dirty_tx) {
1596 /* dirty_tx is met in the cycle of cur_tx, buffer full */
1597 sis_priv->tx_full = 1;
1598 netif_stop_queue(net_dev);
1599 } else if (count_dirty_tx < NUM_TX_DESC) {
1600 /* Typical path, tell upper layer that more transmission is possible */
1601 netif_start_queue(net_dev);
1603 /* buffer full, tell upper layer no more transmission */
1604 sis_priv->tx_full = 1;
1605 netif_stop_queue(net_dev);
1608 spin_unlock_irqrestore(&sis_priv->lock, flags);
1610 net_dev->trans_start = jiffies;
1612 if (netif_msg_tx_queued(sis_priv))
1613 printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
1615 net_dev->name, skb->data, (int)skb->len, entry);
1621 * sis900_interrupt - sis900 interrupt handler
1622 * @irq: the irq number
1623 * @dev_instance: the client data object
1624 * @regs: snapshot of processor context
1626 * The interrupt handler does all of the Rx thread work,
1627 * and cleans up after the Tx thread
1630 static irqreturn_t sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
1632 struct net_device *net_dev = dev_instance;
1633 struct sis900_private *sis_priv = net_dev->priv;
1634 int boguscnt = max_interrupt_work;
1635 long ioaddr = net_dev->base_addr;
1637 unsigned int handled = 0;
1639 spin_lock (&sis_priv->lock);
1642 status = inl(ioaddr + isr);
1644 if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0)
1645 /* nothing intresting happened */
1649 /* why dow't we break after Tx/Rx case ?? keyword: full-duplex */
1650 if (status & (RxORN | RxERR | RxOK))
1654 if (status & (TxURN | TxERR | TxIDLE))
1656 sis900_finish_xmit(net_dev);
1658 /* something strange happened !!! */
1659 if (status & HIBERR) {
1660 if(netif_msg_intr(sis_priv))
1661 printk(KERN_INFO "%s: Abnormal interrupt,"
1662 "status %#8.8x.\n", net_dev->name, status);
1665 if (--boguscnt < 0) {
1666 if(netif_msg_intr(sis_priv))
1667 printk(KERN_INFO "%s: Too much work at interrupt, "
1668 "interrupt status = %#8.8x.\n",
1669 net_dev->name, status);
1674 if(netif_msg_intr(sis_priv))
1675 printk(KERN_DEBUG "%s: exiting interrupt, "
1676 "interrupt status = 0x%#8.8x.\n",
1677 net_dev->name, inl(ioaddr + isr));
1679 spin_unlock (&sis_priv->lock);
1680 return IRQ_RETVAL(handled);
1684 * sis900_rx - sis900 receive routine
1685 * @net_dev: the net device which receives data
1687 * Process receive interrupt events,
1688 * put buffer to higher layer and refill buffer pool
1689 * Note: This fucntion is called by interrupt handler,
1690 * don't do "too much" work here
1693 static int sis900_rx(struct net_device *net_dev)
1695 struct sis900_private *sis_priv = net_dev->priv;
1696 long ioaddr = net_dev->base_addr;
1697 unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
1698 u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
1701 if (netif_msg_rx_status(sis_priv))
1702 printk(KERN_DEBUG "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
1704 sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
1705 rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
1707 while (rx_status & OWN) {
1708 unsigned int rx_size;
1710 if (--rx_work_limit < 0)
1713 rx_size = (rx_status & DSIZE) - CRC_SIZE;
1715 if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
1716 /* corrupted packet received */
1717 if (netif_msg_rx_err(sis_priv))
1718 printk(KERN_DEBUG "%s: Corrupted packet "
1719 "received, buffer status = 0x%8.8x.\n",
1720 net_dev->name, rx_status);
1721 sis_priv->stats.rx_errors++;
1722 if (rx_status & OVERRUN)
1723 sis_priv->stats.rx_over_errors++;
1724 if (rx_status & (TOOLONG|RUNT))
1725 sis_priv->stats.rx_length_errors++;
1726 if (rx_status & (RXISERR | FAERR))
1727 sis_priv->stats.rx_frame_errors++;
1728 if (rx_status & CRCERR)
1729 sis_priv->stats.rx_crc_errors++;
1730 /* reset buffer descriptor state */
1731 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1733 struct sk_buff * skb;
1735 /* This situation should never happen, but due to
1736 some unknow bugs, it is possible that
1737 we are working on NULL sk_buff :-( */
1738 if (sis_priv->rx_skbuff[entry] == NULL) {
1739 if (netif_msg_rx_err(sis_priv))
1740 printk(KERN_WARNING "%s: NULL pointer "
1741 "encountered in Rx ring\n"
1742 "cur_rx:%4.4d, dirty_rx:%4.4d\n",
1743 net_dev->name, sis_priv->cur_rx,
1744 sis_priv->dirty_rx);
1748 pci_unmap_single(sis_priv->pci_dev,
1749 sis_priv->rx_ring[entry].bufptr, RX_BUF_SIZE,
1750 PCI_DMA_FROMDEVICE);
1751 /* give the socket buffer to upper layers */
1752 skb = sis_priv->rx_skbuff[entry];
1753 skb_put(skb, rx_size);
1754 skb->protocol = eth_type_trans(skb, net_dev);
1757 /* some network statistics */
1758 if ((rx_status & BCAST) == MCAST)
1759 sis_priv->stats.multicast++;
1760 net_dev->last_rx = jiffies;
1761 sis_priv->stats.rx_bytes += rx_size;
1762 sis_priv->stats.rx_packets++;
1764 /* refill the Rx buffer, what if there is not enought
1765 * memory for new socket buffer ?? */
1766 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1767 /* not enough memory for skbuff, this makes a
1768 * "hole" on the buffer ring, it is not clear
1769 * how the hardware will react to this kind
1770 * of degenerated buffer */
1771 if (netif_msg_rx_status(sis_priv))
1772 printk(KERN_INFO "%s: Memory squeeze,"
1773 "deferring packet.\n",
1775 sis_priv->rx_skbuff[entry] = NULL;
1776 /* reset buffer descriptor state */
1777 sis_priv->rx_ring[entry].cmdsts = 0;
1778 sis_priv->rx_ring[entry].bufptr = 0;
1779 sis_priv->stats.rx_dropped++;
1784 sis_priv->rx_skbuff[entry] = skb;
1785 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1786 sis_priv->rx_ring[entry].bufptr =
1787 pci_map_single(sis_priv->pci_dev, skb->data,
1788 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1789 sis_priv->dirty_rx++;
1792 entry = sis_priv->cur_rx % NUM_RX_DESC;
1793 rx_status = sis_priv->rx_ring[entry].cmdsts;
1796 /* refill the Rx buffer, what if the rate of refilling is slower
1797 * than consuming ?? */
1798 for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
1799 struct sk_buff *skb;
1801 entry = sis_priv->dirty_rx % NUM_RX_DESC;
1803 if (sis_priv->rx_skbuff[entry] == NULL) {
1804 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1805 /* not enough memory for skbuff, this makes a
1806 * "hole" on the buffer ring, it is not clear
1807 * how the hardware will react to this kind
1808 * of degenerated buffer */
1809 if (netif_msg_rx_err(sis_priv))
1810 printk(KERN_INFO "%s: Memory squeeze,"
1811 "deferring packet.\n",
1813 sis_priv->stats.rx_dropped++;
1817 sis_priv->rx_skbuff[entry] = skb;
1818 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1819 sis_priv->rx_ring[entry].bufptr =
1820 pci_map_single(sis_priv->pci_dev, skb->data,
1821 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1824 /* re-enable the potentially idle receive state matchine */
1825 outl(RxENA | inl(ioaddr + cr), ioaddr + cr );
1831 * sis900_finish_xmit - finish up transmission of packets
1832 * @net_dev: the net device to be transmitted on
1834 * Check for error condition and free socket buffer etc
1835 * schedule for more transmission as needed
1836 * Note: This fucntion is called by interrupt handler,
1837 * don't do "too much" work here
1840 static void sis900_finish_xmit (struct net_device *net_dev)
1842 struct sis900_private *sis_priv = net_dev->priv;
1844 for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
1845 struct sk_buff *skb;
1849 entry = sis_priv->dirty_tx % NUM_TX_DESC;
1850 tx_status = sis_priv->tx_ring[entry].cmdsts;
1852 if (tx_status & OWN) {
1853 /* The packet is not transmitted yet (owned by hardware) !
1854 * Note: the interrupt is generated only when Tx Machine
1855 * is idle, so this is an almost impossible case */
1859 if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
1860 /* packet unsuccessfully transmitted */
1861 if (netif_msg_tx_err(sis_priv))
1862 printk(KERN_DEBUG "%s: Transmit "
1863 "error, Tx status %8.8x.\n",
1864 net_dev->name, tx_status);
1865 sis_priv->stats.tx_errors++;
1866 if (tx_status & UNDERRUN)
1867 sis_priv->stats.tx_fifo_errors++;
1868 if (tx_status & ABORT)
1869 sis_priv->stats.tx_aborted_errors++;
1870 if (tx_status & NOCARRIER)
1871 sis_priv->stats.tx_carrier_errors++;
1872 if (tx_status & OWCOLL)
1873 sis_priv->stats.tx_window_errors++;
1875 /* packet successfully transmitted */
1876 sis_priv->stats.collisions += (tx_status & COLCNT) >> 16;
1877 sis_priv->stats.tx_bytes += tx_status & DSIZE;
1878 sis_priv->stats.tx_packets++;
1880 /* Free the original skb. */
1881 skb = sis_priv->tx_skbuff[entry];
1882 pci_unmap_single(sis_priv->pci_dev,
1883 sis_priv->tx_ring[entry].bufptr, skb->len,
1885 dev_kfree_skb_irq(skb);
1886 sis_priv->tx_skbuff[entry] = NULL;
1887 sis_priv->tx_ring[entry].bufptr = 0;
1888 sis_priv->tx_ring[entry].cmdsts = 0;
1891 if (sis_priv->tx_full && netif_queue_stopped(net_dev) &&
1892 sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
1893 /* The ring is no longer full, clear tx_full and schedule
1894 * more transmission by netif_wake_queue(net_dev) */
1895 sis_priv->tx_full = 0;
1896 netif_wake_queue (net_dev);
1901 * sis900_close - close sis900 device
1902 * @net_dev: the net device to be closed
1904 * Disable interrupts, stop the Tx and Rx Status Machine
1905 * free Tx and RX socket buffer
1908 static int sis900_close(struct net_device *net_dev)
1910 long ioaddr = net_dev->base_addr;
1911 struct sis900_private *sis_priv = net_dev->priv;
1912 struct sk_buff *skb;
1915 netif_stop_queue(net_dev);
1917 /* Disable interrupts by clearing the interrupt mask. */
1918 outl(0x0000, ioaddr + imr);
1919 outl(0x0000, ioaddr + ier);
1921 /* Stop the chip's Tx and Rx Status Machine */
1922 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
1924 del_timer(&sis_priv->timer);
1926 free_irq(net_dev->irq, net_dev);
1928 /* Free Tx and RX skbuff */
1929 for (i = 0; i < NUM_RX_DESC; i++) {
1930 skb = sis_priv->rx_skbuff[i];
1932 pci_unmap_single(sis_priv->pci_dev,
1933 sis_priv->rx_ring[i].bufptr,
1934 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1936 sis_priv->rx_skbuff[i] = NULL;
1939 for (i = 0; i < NUM_TX_DESC; i++) {
1940 skb = sis_priv->tx_skbuff[i];
1942 pci_unmap_single(sis_priv->pci_dev,
1943 sis_priv->tx_ring[i].bufptr, skb->len,
1946 sis_priv->tx_skbuff[i] = NULL;
1950 /* Green! Put the chip in low-power mode. */
1956 * sis900_get_drvinfo - Return information about driver
1957 * @net_dev: the net device to probe
1958 * @info: container for info returned
1960 * Process ethtool command such as "ehtool -i" to show information
1963 static void sis900_get_drvinfo(struct net_device *net_dev,
1964 struct ethtool_drvinfo *info)
1966 struct sis900_private *sis_priv = net_dev->priv;
1968 strcpy (info->driver, SIS900_MODULE_NAME);
1969 strcpy (info->version, SIS900_DRV_VERSION);
1970 strcpy (info->bus_info, pci_name(sis_priv->pci_dev));
1973 static u32 sis900_get_msglevel(struct net_device *net_dev)
1975 struct sis900_private *sis_priv = net_dev->priv;
1976 return sis_priv->msg_enable;
1979 static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
1981 struct sis900_private *sis_priv = net_dev->priv;
1982 sis_priv->msg_enable = value;
1985 static u32 sis900_get_link(struct net_device *net_dev)
1987 struct sis900_private *sis_priv = net_dev->priv;
1988 return mii_link_ok(&sis_priv->mii_info);
1991 static int sis900_get_settings(struct net_device *net_dev,
1992 struct ethtool_cmd *cmd)
1994 struct sis900_private *sis_priv = net_dev->priv;
1995 spin_lock_irq(&sis_priv->lock);
1996 mii_ethtool_gset(&sis_priv->mii_info, cmd);
1997 spin_unlock_irq(&sis_priv->lock);
2001 static int sis900_set_settings(struct net_device *net_dev,
2002 struct ethtool_cmd *cmd)
2004 struct sis900_private *sis_priv = net_dev->priv;
2006 spin_lock_irq(&sis_priv->lock);
2007 rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
2008 spin_unlock_irq(&sis_priv->lock);
2012 static int sis900_nway_reset(struct net_device *net_dev)
2014 struct sis900_private *sis_priv = net_dev->priv;
2015 return mii_nway_restart(&sis_priv->mii_info);
2018 static struct ethtool_ops sis900_ethtool_ops = {
2019 .get_drvinfo = sis900_get_drvinfo,
2020 .get_msglevel = sis900_get_msglevel,
2021 .set_msglevel = sis900_set_msglevel,
2022 .get_link = sis900_get_link,
2023 .get_settings = sis900_get_settings,
2024 .set_settings = sis900_set_settings,
2025 .nway_reset = sis900_nway_reset,
2029 * mii_ioctl - process MII i/o control command
2030 * @net_dev: the net device to command for
2031 * @rq: parameter for command
2032 * @cmd: the i/o command
2034 * Process MII command like read/write MII register
2037 static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
2039 struct sis900_private *sis_priv = net_dev->priv;
2040 struct mii_ioctl_data *data = if_mii(rq);
2043 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2044 data->phy_id = sis_priv->mii->phy_addr;
2047 case SIOCGMIIREG: /* Read MII PHY register. */
2048 data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
2051 case SIOCSMIIREG: /* Write MII PHY register. */
2052 if (!capable(CAP_NET_ADMIN))
2054 mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
2062 * sis900_get_stats - Get sis900 read/write statistics
2063 * @net_dev: the net device to get statistics for
2065 * get tx/rx statistics for sis900
2068 static struct net_device_stats *
2069 sis900_get_stats(struct net_device *net_dev)
2071 struct sis900_private *sis_priv = net_dev->priv;
2073 return &sis_priv->stats;
2077 * sis900_set_config - Set media type by net_device.set_config
2078 * @dev: the net device for media type change
2079 * @map: ifmap passed by ifconfig
2081 * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
2082 * we support only port changes. All other runtime configuration
2083 * changes will be ignored
2086 static int sis900_set_config(struct net_device *dev, struct ifmap *map)
2088 struct sis900_private *sis_priv = dev->priv;
2089 struct mii_phy *mii_phy = sis_priv->mii;
2093 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
2094 /* we switch on the ifmap->port field. I couldn't find anything
2095 * like a definition or standard for the values of that field.
2096 * I think the meaning of those values is device specific. But
2097 * since I would like to change the media type via the ifconfig
2098 * command I use the definition from linux/netdevice.h
2099 * (which seems to be different from the ifport(pcmcia) definition) */
2101 case IF_PORT_UNKNOWN: /* use auto here */
2102 dev->if_port = map->port;
2103 /* we are going to change the media type, so the Link
2104 * will be temporary down and we need to reflect that
2105 * here. When the Link comes up again, it will be
2106 * sensed by the sis_timer procedure, which also does
2107 * all the rest for us */
2108 netif_carrier_off(dev);
2110 /* read current state */
2111 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2113 /* enable auto negotiation and reset the negotioation
2114 * (I don't really know what the auto negatiotiation
2115 * reset really means, but it sounds for me right to
2117 mdio_write(dev, mii_phy->phy_addr,
2118 MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
2122 case IF_PORT_10BASET: /* 10BaseT */
2123 dev->if_port = map->port;
2125 /* we are going to change the media type, so the Link
2126 * will be temporary down and we need to reflect that
2127 * here. When the Link comes up again, it will be
2128 * sensed by the sis_timer procedure, which also does
2129 * all the rest for us */
2130 netif_carrier_off(dev);
2132 /* set Speed to 10Mbps */
2133 /* read current state */
2134 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2136 /* disable auto negotiation and force 10MBit mode*/
2137 mdio_write(dev, mii_phy->phy_addr,
2138 MII_CONTROL, status & ~(MII_CNTL_SPEED |
2142 case IF_PORT_100BASET: /* 100BaseT */
2143 case IF_PORT_100BASETX: /* 100BaseTx */
2144 dev->if_port = map->port;
2146 /* we are going to change the media type, so the Link
2147 * will be temporary down and we need to reflect that
2148 * here. When the Link comes up again, it will be
2149 * sensed by the sis_timer procedure, which also does
2150 * all the rest for us */
2151 netif_carrier_off(dev);
2153 /* set Speed to 100Mbps */
2154 /* disable auto negotiation and enable 100MBit Mode */
2155 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2156 mdio_write(dev, mii_phy->phy_addr,
2157 MII_CONTROL, (status & ~MII_CNTL_SPEED) |
2162 case IF_PORT_10BASE2: /* 10Base2 */
2163 case IF_PORT_AUI: /* AUI */
2164 case IF_PORT_100BASEFX: /* 100BaseFx */
2165 /* These Modes are not supported (are they?)*/
2177 * sis900_mcast_bitnr - compute hashtable index
2178 * @addr: multicast address
2179 * @revision: revision id of chip
2181 * SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
2182 * hash table, which makes this function a little bit different from other drivers
2183 * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
2184 * multicast hash table.
2187 static inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
2190 u32 crc = ether_crc(6, addr);
2192 /* leave 8 or 7 most siginifant bits */
2193 if ((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
2194 return ((int)(crc >> 24));
2196 return ((int)(crc >> 25));
2200 * set_rx_mode - Set SiS900 receive mode
2201 * @net_dev: the net device to be set
2203 * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
2204 * And set the appropriate multicast filter.
2205 * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
2208 static void set_rx_mode(struct net_device *net_dev)
2210 long ioaddr = net_dev->base_addr;
2211 struct sis900_private * sis_priv = net_dev->priv;
2212 u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
2213 int i, table_entries;
2216 /* 635 Hash Table entires = 256(2^16) */
2217 if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
2218 (sis_priv->chipset_rev == SIS900B_900_REV))
2223 if (net_dev->flags & IFF_PROMISC) {
2224 /* Accept any kinds of packets */
2225 rx_mode = RFPromiscuous;
2226 for (i = 0; i < table_entries; i++)
2227 mc_filter[i] = 0xffff;
2228 } else if ((net_dev->mc_count > multicast_filter_limit) ||
2229 (net_dev->flags & IFF_ALLMULTI)) {
2230 /* too many multicast addresses or accept all multicast packet */
2231 rx_mode = RFAAB | RFAAM;
2232 for (i = 0; i < table_entries; i++)
2233 mc_filter[i] = 0xffff;
2235 /* Accept Broadcast packet, destination address matchs our
2236 * MAC address, use Receive Filter to reject unwanted MCAST
2238 struct dev_mc_list *mclist;
2240 for (i = 0, mclist = net_dev->mc_list;
2241 mclist && i < net_dev->mc_count;
2242 i++, mclist = mclist->next) {
2243 unsigned int bit_nr =
2244 sis900_mcast_bitnr(mclist->dmi_addr, sis_priv->chipset_rev);
2245 mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
2249 /* update Multicast Hash Table in Receive Filter */
2250 for (i = 0; i < table_entries; i++) {
2251 /* why plus 0x04 ??, That makes the correct value for hash table. */
2252 outl((u32)(0x00000004+i) << RFADDR_shift, ioaddr + rfcr);
2253 outl(mc_filter[i], ioaddr + rfdr);
2256 outl(RFEN | rx_mode, ioaddr + rfcr);
2258 /* sis900 is capable of looping back packets at MAC level for
2259 * debugging purpose */
2260 if (net_dev->flags & IFF_LOOPBACK) {
2262 /* We must disable Tx/Rx before setting loopback mode */
2263 cr_saved = inl(ioaddr + cr);
2264 outl(cr_saved | TxDIS | RxDIS, ioaddr + cr);
2265 /* enable loopback */
2266 outl(inl(ioaddr + txcfg) | TxMLB, ioaddr + txcfg);
2267 outl(inl(ioaddr + rxcfg) | RxATX, ioaddr + rxcfg);
2269 outl(cr_saved, ioaddr + cr);
2276 * sis900_reset - Reset sis900 MAC
2277 * @net_dev: the net device to reset
2279 * reset sis900 MAC and wait until finished
2280 * reset through command register
2281 * change backoff algorithm for 900B0 & 635 M/B
2284 static void sis900_reset(struct net_device *net_dev)
2286 struct sis900_private * sis_priv = net_dev->priv;
2287 long ioaddr = net_dev->base_addr;
2289 u32 status = TxRCMP | RxRCMP;
2291 outl(0, ioaddr + ier);
2292 outl(0, ioaddr + imr);
2293 outl(0, ioaddr + rfcr);
2295 outl(RxRESET | TxRESET | RESET | inl(ioaddr + cr), ioaddr + cr);
2297 /* Check that the chip has finished the reset. */
2298 while (status && (i++ < 1000)) {
2299 status ^= (inl(isr + ioaddr) & status);
2302 if( (sis_priv->chipset_rev >= SIS635A_900_REV) ||
2303 (sis_priv->chipset_rev == SIS900B_900_REV) )
2304 outl(PESEL | RND_CNT, ioaddr + cfg);
2306 outl(PESEL, ioaddr + cfg);
2310 * sis900_remove - Remove sis900 device
2311 * @pci_dev: the pci device to be removed
2313 * remove and release SiS900 net device
2316 static void __devexit sis900_remove(struct pci_dev *pci_dev)
2318 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2319 struct sis900_private * sis_priv = net_dev->priv;
2320 struct mii_phy *phy = NULL;
2322 while (sis_priv->first_mii) {
2323 phy = sis_priv->first_mii;
2324 sis_priv->first_mii = phy->next;
2328 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
2329 sis_priv->rx_ring_dma);
2330 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
2331 sis_priv->tx_ring_dma);
2332 unregister_netdev(net_dev);
2333 free_netdev(net_dev);
2334 pci_release_regions(pci_dev);
2335 pci_set_drvdata(pci_dev, NULL);
2340 static int sis900_suspend(struct pci_dev *pci_dev, pm_message_t state)
2342 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2343 long ioaddr = net_dev->base_addr;
2345 if(!netif_running(net_dev))
2348 netif_stop_queue(net_dev);
2349 netif_device_detach(net_dev);
2351 /* Stop the chip's Tx and Rx Status Machine */
2352 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
2354 pci_set_power_state(pci_dev, PCI_D3hot);
2355 pci_save_state(pci_dev);
2360 static int sis900_resume(struct pci_dev *pci_dev)
2362 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2363 struct sis900_private *sis_priv = net_dev->priv;
2364 long ioaddr = net_dev->base_addr;
2366 if(!netif_running(net_dev))
2368 pci_restore_state(pci_dev);
2369 pci_set_power_state(pci_dev, PCI_D0);
2371 sis900_init_rxfilter(net_dev);
2373 sis900_init_tx_ring(net_dev);
2374 sis900_init_rx_ring(net_dev);
2376 set_rx_mode(net_dev);
2378 netif_device_attach(net_dev);
2379 netif_start_queue(net_dev);
2381 /* Workaround for EDB */
2382 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
2384 /* Enable all known interrupts by setting the interrupt mask. */
2385 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
2386 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
2387 outl(IE, ioaddr + ier);
2389 sis900_check_mode(net_dev, sis_priv->mii);
2393 #endif /* CONFIG_PM */
2395 static struct pci_driver sis900_pci_driver = {
2396 .name = SIS900_MODULE_NAME,
2397 .id_table = sis900_pci_tbl,
2398 .probe = sis900_probe,
2399 .remove = __devexit_p(sis900_remove),
2401 .suspend = sis900_suspend,
2402 .resume = sis900_resume,
2403 #endif /* CONFIG_PM */
2406 static int __init sis900_init_module(void)
2408 /* when a module, this is printed whether or not devices are found in probe */
2413 return pci_module_init(&sis900_pci_driver);
2416 static void __exit sis900_cleanup_module(void)
2418 pci_unregister_driver(&sis900_pci_driver);
2421 module_init(sis900_init_module);
2422 module_exit(sis900_cleanup_module);