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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
2 Copyright 1999 Silicon Integrated System Corporation
Daniele Venzanod269a692006-04-17 10:28:06 +02003 Revision: 1.08.10 Apr. 2 2006
Linus Torvalds1da177e2005-04-16 15:20:36 -07004
5 Modified from the driver which is originally written by Donald Becker.
6
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.
11
12 References:
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
19
Daniele Venzanod269a692006-04-17 10:28:06 +020020 Rev 1.08.10 Apr. 2 2006 Daniele Venzano add vlan (jumbo packets) support
Daniele Venzanoea37cce2005-10-11 09:44:30 +020021 Rev 1.08.09 Sep. 19 2005 Daniele Venzano add Wake on LAN support
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 Rev 1.08.08 Jan. 22 2005 Daniele Venzano use netif_msg for debugging messages
Daniele Venzanod269a692006-04-17 10:28:06 +020023 Rev 1.08.07 Nov. 2 2003 Daniele Venzano <venza@brownhat.org> add suspend/resume support
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 Rev 1.08.06 Sep. 24 2002 Mufasa Yang bug fix for Tx timeout & add SiS963 support
25 Rev 1.08.05 Jun. 6 2002 Mufasa Yang bug fix for read_eeprom & Tx descriptor over-boundary
26 Rev 1.08.04 Apr. 25 2002 Mufasa Yang <mufasa@sis.com.tw> added SiS962 support
27 Rev 1.08.03 Feb. 1 2002 Matt Domsch <Matt_Domsch@dell.com> update to use library crc32 function
28 Rev 1.08.02 Nov. 30 2001 Hui-Fen Hsu workaround for EDB & bug fix for dhcp problem
29 Rev 1.08.01 Aug. 25 2001 Hui-Fen Hsu update for 630ET & workaround for ICS1893 PHY
30 Rev 1.08.00 Jun. 11 2001 Hui-Fen Hsu workaround for RTL8201 PHY and some bug fix
31 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
32 Rev 1.07.10 Mar. 1 2001 Hui-Fen Hsu <hfhsu@sis.com.tw> some bug fix & 635M/B support
33 Rev 1.07.09 Feb. 9 2001 Dave Jones <davej@suse.de> PCI enable cleanup
34 Rev 1.07.08 Jan. 8 2001 Lei-Chun Chang added RTL8201 PHY support
35 Rev 1.07.07 Nov. 29 2000 Lei-Chun Chang added kernel-doc extractable documentation and 630 workaround fix
36 Rev 1.07.06 Nov. 7 2000 Jeff Garzik <jgarzik@pobox.com> some bug fix and cleaning
37 Rev 1.07.05 Nov. 6 2000 metapirat<metapirat@gmx.de> contribute media type select by ifconfig
38 Rev 1.07.04 Sep. 6 2000 Lei-Chun Chang added ICS1893 PHY support
39 Rev 1.07.03 Aug. 24 2000 Lei-Chun Chang (lcchang@sis.com.tw) modified 630E eqaulizer workaround rule
40 Rev 1.07.01 Aug. 08 2000 Ollie Lho minor update for SiS 630E and SiS 630E A1
41 Rev 1.07 Mar. 07 2000 Ollie Lho bug fix in Rx buffer ring
42 Rev 1.06.04 Feb. 11 2000 Jeff Garzik <jgarzik@pobox.com> softnet and init for kernel 2.4
43 Rev 1.06.03 Dec. 23 1999 Ollie Lho Third release
44 Rev 1.06.02 Nov. 23 1999 Ollie Lho bug in mac probing fixed
45 Rev 1.06.01 Nov. 16 1999 Ollie Lho CRC calculation provide by Joseph Zbiciak (im14u2c@primenet.com)
46 Rev 1.06 Nov. 4 1999 Ollie Lho (ollie@sis.com.tw) Second release
47 Rev 1.05.05 Oct. 29 1999 Ollie Lho (ollie@sis.com.tw) Single buffer Tx/Rx
48 Chin-Shan Li (lcs@sis.com.tw) Added AMD Am79c901 HomePNA PHY support
49 Rev 1.05 Aug. 7 1999 Jim Huang (cmhuang@sis.com.tw) Initial release
50*/
51
52#include <linux/module.h>
53#include <linux/moduleparam.h>
54#include <linux/kernel.h>
55#include <linux/string.h>
56#include <linux/timer.h>
57#include <linux/errno.h>
58#include <linux/ioport.h>
59#include <linux/slab.h>
60#include <linux/interrupt.h>
61#include <linux/pci.h>
62#include <linux/netdevice.h>
63#include <linux/init.h>
64#include <linux/mii.h>
65#include <linux/etherdevice.h>
66#include <linux/skbuff.h>
67#include <linux/delay.h>
68#include <linux/ethtool.h>
69#include <linux/crc32.h>
70#include <linux/bitops.h>
Tobias Klauser12b279f2005-04-04 18:10:18 +020071#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73#include <asm/processor.h> /* Processor type for cache alignment. */
74#include <asm/io.h>
75#include <asm/irq.h>
76#include <asm/uaccess.h> /* User space memory access functions */
77
78#include "sis900.h"
79
80#define SIS900_MODULE_NAME "sis900"
Daniele Venzanod269a692006-04-17 10:28:06 +020081#define SIS900_DRV_VERSION "v1.08.10 Apr. 2 2006"
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83static char version[] __devinitdata =
84KERN_INFO "sis900.c: " SIS900_DRV_VERSION "\n";
85
86static int max_interrupt_work = 40;
87static int multicast_filter_limit = 128;
88
89static int sis900_debug = -1; /* Use SIS900_DEF_MSG as value */
90
91#define SIS900_DEF_MSG \
92 (NETIF_MSG_DRV | \
93 NETIF_MSG_LINK | \
94 NETIF_MSG_RX_ERR | \
95 NETIF_MSG_TX_ERR)
96
97/* Time in jiffies before concluding the transmitter is hung. */
98#define TX_TIMEOUT (4*HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100enum {
101 SIS_900 = 0,
102 SIS_7016
103};
Arjan van de Venf71e1302006-03-03 21:33:57 -0500104static const char * card_names[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 "SiS 900 PCI Fast Ethernet",
106 "SiS 7016 PCI Fast Ethernet"
107};
108static struct pci_device_id sis900_pci_tbl [] = {
109 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
110 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_900},
111 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
112 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7016},
113 {0,}
114};
115MODULE_DEVICE_TABLE (pci, sis900_pci_tbl);
116
117static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex);
118
Arjan van de Venf71e1302006-03-03 21:33:57 -0500119static const struct mii_chip_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 const char * name;
121 u16 phy_id0;
122 u16 phy_id1;
123 u8 phy_types;
124#define HOME 0x0001
125#define LAN 0x0002
126#define MIX 0x0003
127#define UNKNOWN 0x0
128} mii_chip_table[] = {
129 { "SiS 900 Internal MII PHY", 0x001d, 0x8000, LAN },
130 { "SiS 7014 Physical Layer Solution", 0x0016, 0xf830, LAN },
James Camerond8e95e52006-05-10 13:33:29 -0700131 { "SiS 900 on Foxconn 661 7MI", 0x0143, 0xBC70, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 { "Altimata AC101LF PHY", 0x0022, 0x5520, LAN },
Artur Skawina494aced2006-03-21 22:04:36 +0100133 { "ADM 7001 LAN PHY", 0x002e, 0xcc60, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 { "AMD 79C901 10BASE-T PHY", 0x0000, 0x6B70, LAN },
135 { "AMD 79C901 HomePNA PHY", 0x0000, 0x6B90, HOME},
136 { "ICS LAN PHY", 0x0015, 0xF440, LAN },
Daniele Venzano80a80032006-08-12 11:17:03 +0200137 { "ICS LAN PHY", 0x0143, 0xBC70, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 { "NS 83851 PHY", 0x2000, 0x5C20, MIX },
139 { "NS 83847 PHY", 0x2000, 0x5C30, MIX },
140 { "Realtek RTL8201 PHY", 0x0000, 0x8200, LAN },
141 { "VIA 6103 PHY", 0x0101, 0x8f20, LAN },
142 {NULL,},
143};
144
145struct mii_phy {
146 struct mii_phy * next;
147 int phy_addr;
148 u16 phy_id0;
149 u16 phy_id1;
150 u16 status;
151 u8 phy_types;
152};
153
154typedef struct _BufferDesc {
155 u32 link;
156 u32 cmdsts;
157 u32 bufptr;
158} BufferDesc;
159
160struct sis900_private {
161 struct net_device_stats stats;
162 struct pci_dev * pci_dev;
163
164 spinlock_t lock;
165
166 struct mii_phy * mii;
167 struct mii_phy * first_mii; /* record the first mii structure */
168 unsigned int cur_phy;
Daniele Venzanoda369b02005-05-12 20:13:14 -0400169 struct mii_if_info mii_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 struct timer_list timer; /* Link status detection timer. */
172 u8 autong_complete; /* 1: auto-negotiate complete */
173
174 u32 msg_enable;
175
176 unsigned int cur_rx, dirty_rx; /* producer/comsumer pointers for Tx/Rx ring */
177 unsigned int cur_tx, dirty_tx;
178
179 /* The saved address of a sent/receive-in-place packet buffer */
180 struct sk_buff *tx_skbuff[NUM_TX_DESC];
181 struct sk_buff *rx_skbuff[NUM_RX_DESC];
182 BufferDesc *tx_ring;
183 BufferDesc *rx_ring;
184
185 dma_addr_t tx_ring_dma;
186 dma_addr_t rx_ring_dma;
187
188 unsigned int tx_full; /* The Tx queue is full. */
189 u8 host_bridge_rev;
190 u8 chipset_rev;
191};
192
193MODULE_AUTHOR("Jim Huang <cmhuang@sis.com.tw>, Ollie Lho <ollie@sis.com.tw>");
194MODULE_DESCRIPTION("SiS 900 PCI Fast Ethernet driver");
195MODULE_LICENSE("GPL");
196
197module_param(multicast_filter_limit, int, 0444);
198module_param(max_interrupt_work, int, 0444);
199module_param(sis900_debug, int, 0444);
200MODULE_PARM_DESC(multicast_filter_limit, "SiS 900/7016 maximum number of filtered multicast addresses");
201MODULE_PARM_DESC(max_interrupt_work, "SiS 900/7016 maximum events handled per interrupt");
202MODULE_PARM_DESC(sis900_debug, "SiS 900/7016 bitmapped debugging message level");
203
204#ifdef CONFIG_NET_POLL_CONTROLLER
205static void sis900_poll(struct net_device *dev);
206#endif
207static int sis900_open(struct net_device *net_dev);
208static int sis900_mii_probe (struct net_device * net_dev);
209static void sis900_init_rxfilter (struct net_device * net_dev);
210static u16 read_eeprom(long ioaddr, int location);
Daniele Venzanoda369b02005-05-12 20:13:14 -0400211static int mdio_read(struct net_device *net_dev, int phy_id, int location);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212static void mdio_write(struct net_device *net_dev, int phy_id, int location, int val);
213static void sis900_timer(unsigned long data);
214static void sis900_check_mode (struct net_device *net_dev, struct mii_phy *mii_phy);
215static void sis900_tx_timeout(struct net_device *net_dev);
216static void sis900_init_tx_ring(struct net_device *net_dev);
217static void sis900_init_rx_ring(struct net_device *net_dev);
218static int sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev);
219static int sis900_rx(struct net_device *net_dev);
220static void sis900_finish_xmit (struct net_device *net_dev);
221static irqreturn_t sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
222static int sis900_close(struct net_device *net_dev);
223static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd);
224static struct net_device_stats *sis900_get_stats(struct net_device *net_dev);
225static u16 sis900_mcast_bitnr(u8 *addr, u8 revision);
226static void set_rx_mode(struct net_device *net_dev);
227static void sis900_reset(struct net_device *net_dev);
228static void sis630_set_eq(struct net_device *net_dev, u8 revision);
229static int sis900_set_config(struct net_device *dev, struct ifmap *map);
230static u16 sis900_default_phy(struct net_device * net_dev);
231static void sis900_set_capability( struct net_device *net_dev ,struct mii_phy *phy);
232static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr);
233static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr);
234static void sis900_set_mode (long ioaddr, int speed, int duplex);
235static struct ethtool_ops sis900_ethtool_ops;
236
237/**
238 * sis900_get_mac_addr - Get MAC address for stand alone SiS900 model
239 * @pci_dev: the sis900 pci device
240 * @net_dev: the net device to get address for
241 *
242 * Older SiS900 and friends, use EEPROM to store MAC address.
243 * MAC address is read from read_eeprom() into @net_dev->dev_addr.
244 */
245
246static int __devinit sis900_get_mac_addr(struct pci_dev * pci_dev, struct net_device *net_dev)
247{
248 long ioaddr = pci_resource_start(pci_dev, 0);
249 u16 signature;
250 int i;
251
252 /* check to see if we have sane EEPROM */
253 signature = (u16) read_eeprom(ioaddr, EEPROMSignature);
254 if (signature == 0xffff || signature == 0x0000) {
255 printk (KERN_WARNING "%s: Error EERPOM read %x\n",
256 pci_name(pci_dev), signature);
257 return 0;
258 }
259
260 /* get MAC address from EEPROM */
261 for (i = 0; i < 3; i++)
262 ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
263
264 return 1;
265}
266
267/**
268 * sis630e_get_mac_addr - Get MAC address for SiS630E model
269 * @pci_dev: the sis900 pci device
270 * @net_dev: the net device to get address for
271 *
272 * SiS630E model, use APC CMOS RAM to store MAC address.
273 * APC CMOS RAM is accessed through ISA bridge.
274 * MAC address is read into @net_dev->dev_addr.
275 */
276
277static int __devinit sis630e_get_mac_addr(struct pci_dev * pci_dev,
278 struct net_device *net_dev)
279{
280 struct pci_dev *isa_bridge = NULL;
281 u8 reg;
282 int i;
283
284 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0008, isa_bridge);
285 if (!isa_bridge)
286 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0018, isa_bridge);
287 if (!isa_bridge) {
288 printk(KERN_WARNING "%s: Can not find ISA bridge\n",
289 pci_name(pci_dev));
290 return 0;
291 }
292 pci_read_config_byte(isa_bridge, 0x48, &reg);
293 pci_write_config_byte(isa_bridge, 0x48, reg | 0x40);
294
295 for (i = 0; i < 6; i++) {
296 outb(0x09 + i, 0x70);
297 ((u8 *)(net_dev->dev_addr))[i] = inb(0x71);
298 }
299 pci_write_config_byte(isa_bridge, 0x48, reg & ~0x40);
300 pci_dev_put(isa_bridge);
301
302 return 1;
303}
304
305
306/**
307 * sis635_get_mac_addr - Get MAC address for SIS635 model
308 * @pci_dev: the sis900 pci device
309 * @net_dev: the net device to get address for
310 *
311 * SiS635 model, set MAC Reload Bit to load Mac address from APC
312 * to rfdr. rfdr is accessed through rfcr. MAC address is read into
313 * @net_dev->dev_addr.
314 */
315
316static int __devinit sis635_get_mac_addr(struct pci_dev * pci_dev,
317 struct net_device *net_dev)
318{
319 long ioaddr = net_dev->base_addr;
320 u32 rfcrSave;
321 u32 i;
322
323 rfcrSave = inl(rfcr + ioaddr);
324
325 outl(rfcrSave | RELOAD, ioaddr + cr);
326 outl(0, ioaddr + cr);
327
328 /* disable packet filtering before setting filter */
329 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
330
331 /* load MAC addr to filter data register */
332 for (i = 0 ; i < 3 ; i++) {
333 outl((i << RFADDR_shift), ioaddr + rfcr);
334 *( ((u16 *)net_dev->dev_addr) + i) = inw(ioaddr + rfdr);
335 }
336
337 /* enable packet filtering */
338 outl(rfcrSave | RFEN, rfcr + ioaddr);
339
340 return 1;
341}
342
343/**
344 * sis96x_get_mac_addr - Get MAC address for SiS962 or SiS963 model
345 * @pci_dev: the sis900 pci device
346 * @net_dev: the net device to get address for
347 *
348 * SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
349 * is shared by
350 * LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
351 * and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
352 * by LAN, otherwise is not. After MAC address is read from EEPROM, send
353 * EEDONE signal to refuse EEPROM access by LAN.
354 * The EEPROM map of SiS962 or SiS963 is different to SiS900.
355 * The signature field in SiS962 or SiS963 spec is meaningless.
356 * MAC address is read into @net_dev->dev_addr.
357 */
358
359static int __devinit sis96x_get_mac_addr(struct pci_dev * pci_dev,
360 struct net_device *net_dev)
361{
362 long ioaddr = net_dev->base_addr;
363 long ee_addr = ioaddr + mear;
364 u32 waittime = 0;
365 int i;
366
367 outl(EEREQ, ee_addr);
368 while(waittime < 2000) {
369 if(inl(ee_addr) & EEGNT) {
370
371 /* get MAC address from EEPROM */
372 for (i = 0; i < 3; i++)
373 ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
374
375 outl(EEDONE, ee_addr);
376 return 1;
377 } else {
378 udelay(1);
379 waittime ++;
380 }
381 }
382 outl(EEDONE, ee_addr);
383 return 0;
384}
385
386/**
387 * sis900_probe - Probe for sis900 device
388 * @pci_dev: the sis900 pci device
389 * @pci_id: the pci device ID
390 *
391 * Check and probe sis900 net device for @pci_dev.
392 * Get mac address according to the chip revision,
393 * and assign SiS900-specific entries in the device structure.
394 * ie: sis900_open(), sis900_start_xmit(), sis900_close(), etc.
395 */
396
397static int __devinit sis900_probe(struct pci_dev *pci_dev,
398 const struct pci_device_id *pci_id)
399{
400 struct sis900_private *sis_priv;
401 struct net_device *net_dev;
402 struct pci_dev *dev;
403 dma_addr_t ring_dma;
404 void *ring_space;
405 long ioaddr;
406 int i, ret;
Arjan van de Venf71e1302006-03-03 21:33:57 -0500407 const char *card_name = card_names[pci_id->driver_data];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 const char *dev_name = pci_name(pci_dev);
409
410/* when built into the kernel, we only print version if device is found */
411#ifndef MODULE
412 static int printed_version;
413 if (!printed_version++)
414 printk(version);
415#endif
416
417 /* setup various bits in PCI command register */
418 ret = pci_enable_device(pci_dev);
419 if(ret) return ret;
420
Tobias Klauser12b279f2005-04-04 18:10:18 +0200421 i = pci_set_dma_mask(pci_dev, DMA_32BIT_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 if(i){
423 printk(KERN_ERR "sis900.c: architecture does not support"
424 "32bit PCI busmaster DMA\n");
425 return i;
426 }
427
428 pci_set_master(pci_dev);
429
430 net_dev = alloc_etherdev(sizeof(struct sis900_private));
431 if (!net_dev)
432 return -ENOMEM;
433 SET_MODULE_OWNER(net_dev);
434 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
435
436 /* We do a request_region() to register /proc/ioports info. */
437 ioaddr = pci_resource_start(pci_dev, 0);
438 ret = pci_request_regions(pci_dev, "sis900");
439 if (ret)
440 goto err_out;
441
442 sis_priv = net_dev->priv;
443 net_dev->base_addr = ioaddr;
444 net_dev->irq = pci_dev->irq;
445 sis_priv->pci_dev = pci_dev;
446 spin_lock_init(&sis_priv->lock);
447
448 pci_set_drvdata(pci_dev, net_dev);
449
450 ring_space = pci_alloc_consistent(pci_dev, TX_TOTAL_SIZE, &ring_dma);
451 if (!ring_space) {
452 ret = -ENOMEM;
453 goto err_out_cleardev;
454 }
455 sis_priv->tx_ring = (BufferDesc *)ring_space;
456 sis_priv->tx_ring_dma = ring_dma;
457
458 ring_space = pci_alloc_consistent(pci_dev, RX_TOTAL_SIZE, &ring_dma);
459 if (!ring_space) {
460 ret = -ENOMEM;
461 goto err_unmap_tx;
462 }
463 sis_priv->rx_ring = (BufferDesc *)ring_space;
464 sis_priv->rx_ring_dma = ring_dma;
465
466 /* The SiS900-specific entries in the device structure. */
467 net_dev->open = &sis900_open;
468 net_dev->hard_start_xmit = &sis900_start_xmit;
469 net_dev->stop = &sis900_close;
470 net_dev->get_stats = &sis900_get_stats;
471 net_dev->set_config = &sis900_set_config;
472 net_dev->set_multicast_list = &set_rx_mode;
473 net_dev->do_ioctl = &mii_ioctl;
474 net_dev->tx_timeout = sis900_tx_timeout;
475 net_dev->watchdog_timeo = TX_TIMEOUT;
476 net_dev->ethtool_ops = &sis900_ethtool_ops;
477
478#ifdef CONFIG_NET_POLL_CONTROLLER
479 net_dev->poll_controller = &sis900_poll;
480#endif
481
482 if (sis900_debug > 0)
483 sis_priv->msg_enable = sis900_debug;
484 else
485 sis_priv->msg_enable = SIS900_DEF_MSG;
Daniele Venzanoda369b02005-05-12 20:13:14 -0400486
487 sis_priv->mii_info.dev = net_dev;
488 sis_priv->mii_info.mdio_read = mdio_read;
489 sis_priv->mii_info.mdio_write = mdio_write;
490 sis_priv->mii_info.phy_id_mask = 0x1f;
491 sis_priv->mii_info.reg_num_mask = 0x1f;
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 /* Get Mac address according to the chip revision */
494 pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &(sis_priv->chipset_rev));
495 if(netif_msg_probe(sis_priv))
496 printk(KERN_DEBUG "%s: detected revision %2.2x, "
497 "trying to get MAC address...\n",
498 dev_name, sis_priv->chipset_rev);
499
500 ret = 0;
501 if (sis_priv->chipset_rev == SIS630E_900_REV)
502 ret = sis630e_get_mac_addr(pci_dev, net_dev);
503 else if ((sis_priv->chipset_rev > 0x81) && (sis_priv->chipset_rev <= 0x90) )
504 ret = sis635_get_mac_addr(pci_dev, net_dev);
505 else if (sis_priv->chipset_rev == SIS96x_900_REV)
506 ret = sis96x_get_mac_addr(pci_dev, net_dev);
507 else
508 ret = sis900_get_mac_addr(pci_dev, net_dev);
509
510 if (ret == 0) {
511 printk(KERN_WARNING "%s: Cannot read MAC address.\n", dev_name);
512 ret = -ENODEV;
513 goto err_unmap_rx;
514 }
515
516 /* 630ET : set the mii access mode as software-mode */
517 if (sis_priv->chipset_rev == SIS630ET_900_REV)
518 outl(ACCESSMODE | inl(ioaddr + cr), ioaddr + cr);
519
520 /* probe for mii transceiver */
521 if (sis900_mii_probe(net_dev) == 0) {
522 printk(KERN_WARNING "%s: Error probing MII device.\n",
523 dev_name);
524 ret = -ENODEV;
525 goto err_unmap_rx;
526 }
527
528 /* save our host bridge revision */
529 dev = pci_get_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_630, NULL);
530 if (dev) {
531 pci_read_config_byte(dev, PCI_CLASS_REVISION, &sis_priv->host_bridge_rev);
532 pci_dev_put(dev);
533 }
534
535 ret = register_netdev(net_dev);
536 if (ret)
537 goto err_unmap_rx;
538
539 /* print some information about our NIC */
540 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ", net_dev->name,
541 card_name, ioaddr, net_dev->irq);
542 for (i = 0; i < 5; i++)
543 printk("%2.2x:", (u8)net_dev->dev_addr[i]);
544 printk("%2.2x.\n", net_dev->dev_addr[i]);
545
Daniele Venzanoea37cce2005-10-11 09:44:30 +0200546 /* Detect Wake on Lan support */
Daniele Venzano7bef4b32006-02-25 17:01:09 -0500547 ret = (inl(net_dev->base_addr + CFGPMC) & PMESP) >> 27;
Daniele Venzanoea37cce2005-10-11 09:44:30 +0200548 if (netif_msg_probe(sis_priv) && (ret & PME_D3C) == 0)
549 printk(KERN_INFO "%s: Wake on LAN only available from suspend to RAM.", net_dev->name);
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 return 0;
552
553 err_unmap_rx:
554 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
555 sis_priv->rx_ring_dma);
556 err_unmap_tx:
557 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
558 sis_priv->tx_ring_dma);
559 err_out_cleardev:
560 pci_set_drvdata(pci_dev, NULL);
561 pci_release_regions(pci_dev);
562 err_out:
563 free_netdev(net_dev);
564 return ret;
565}
566
567/**
568 * sis900_mii_probe - Probe MII PHY for sis900
569 * @net_dev: the net device to probe for
570 *
571 * Search for total of 32 possible mii phy addresses.
572 * Identify and set current phy if found one,
573 * return error if it failed to found.
574 */
575
576static int __init sis900_mii_probe(struct net_device * net_dev)
577{
578 struct sis900_private * sis_priv = net_dev->priv;
579 const char *dev_name = pci_name(sis_priv->pci_dev);
580 u16 poll_bit = MII_STAT_LINK, status = 0;
581 unsigned long timeout = jiffies + 5 * HZ;
582 int phy_addr;
583
584 sis_priv->mii = NULL;
585
586 /* search for total of 32 possible mii phy addresses */
587 for (phy_addr = 0; phy_addr < 32; phy_addr++) {
588 struct mii_phy * mii_phy = NULL;
589 u16 mii_status;
590 int i;
591
592 mii_phy = NULL;
593 for(i = 0; i < 2; i++)
594 mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
595
596 if (mii_status == 0xffff || mii_status == 0x0000) {
597 if (netif_msg_probe(sis_priv))
598 printk(KERN_DEBUG "%s: MII at address %d"
599 " not accessible\n",
600 dev_name, phy_addr);
601 continue;
602 }
603
604 if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
605 printk(KERN_WARNING "Cannot allocate mem for struct mii_phy\n");
606 mii_phy = sis_priv->first_mii;
607 while (mii_phy) {
608 struct mii_phy *phy;
609 phy = mii_phy;
610 mii_phy = mii_phy->next;
611 kfree(phy);
612 }
613 return 0;
614 }
615
616 mii_phy->phy_id0 = mdio_read(net_dev, phy_addr, MII_PHY_ID0);
617 mii_phy->phy_id1 = mdio_read(net_dev, phy_addr, MII_PHY_ID1);
618 mii_phy->phy_addr = phy_addr;
619 mii_phy->status = mii_status;
620 mii_phy->next = sis_priv->mii;
621 sis_priv->mii = mii_phy;
622 sis_priv->first_mii = mii_phy;
623
624 for (i = 0; mii_chip_table[i].phy_id1; i++)
625 if ((mii_phy->phy_id0 == mii_chip_table[i].phy_id0 ) &&
626 ((mii_phy->phy_id1 & 0xFFF0) == mii_chip_table[i].phy_id1)){
627 mii_phy->phy_types = mii_chip_table[i].phy_types;
628 if (mii_chip_table[i].phy_types == MIX)
629 mii_phy->phy_types =
630 (mii_status & (MII_STAT_CAN_TX_FDX | MII_STAT_CAN_TX)) ? LAN : HOME;
631 printk(KERN_INFO "%s: %s transceiver found "
632 "at address %d.\n",
633 dev_name,
634 mii_chip_table[i].name,
635 phy_addr);
636 break;
637 }
638
639 if( !mii_chip_table[i].phy_id1 ) {
640 printk(KERN_INFO "%s: Unknown PHY transceiver found at address %d.\n",
641 dev_name, phy_addr);
642 mii_phy->phy_types = UNKNOWN;
643 }
644 }
645
646 if (sis_priv->mii == NULL) {
647 printk(KERN_INFO "%s: No MII transceivers found!\n", dev_name);
648 return 0;
649 }
650
651 /* select default PHY for mac */
652 sis_priv->mii = NULL;
653 sis900_default_phy( net_dev );
654
655 /* Reset phy if default phy is internal sis900 */
656 if ((sis_priv->mii->phy_id0 == 0x001D) &&
657 ((sis_priv->mii->phy_id1&0xFFF0) == 0x8000))
658 status = sis900_reset_phy(net_dev, sis_priv->cur_phy);
659
660 /* workaround for ICS1893 PHY */
661 if ((sis_priv->mii->phy_id0 == 0x0015) &&
662 ((sis_priv->mii->phy_id1&0xFFF0) == 0xF440))
663 mdio_write(net_dev, sis_priv->cur_phy, 0x0018, 0xD200);
664
665 if(status & MII_STAT_LINK){
666 while (poll_bit) {
667 yield();
668
669 poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
670 if (time_after_eq(jiffies, timeout)) {
671 printk(KERN_WARNING "%s: reset phy and link down now\n",
672 dev_name);
673 return -ETIME;
674 }
675 }
676 }
677
678 if (sis_priv->chipset_rev == SIS630E_900_REV) {
679 /* SiS 630E has some bugs on default value of PHY registers */
680 mdio_write(net_dev, sis_priv->cur_phy, MII_ANADV, 0x05e1);
681 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG1, 0x22);
682 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG2, 0xff00);
683 mdio_write(net_dev, sis_priv->cur_phy, MII_MASK, 0xffc0);
684 //mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, 0x1000);
685 }
686
687 if (sis_priv->mii->status & MII_STAT_LINK)
688 netif_carrier_on(net_dev);
689 else
690 netif_carrier_off(net_dev);
691
692 return 1;
693}
694
695/**
696 * sis900_default_phy - Select default PHY for sis900 mac.
697 * @net_dev: the net device to probe for
698 *
699 * Select first detected PHY with link as default.
700 * If no one is link on, select PHY whose types is HOME as default.
701 * If HOME doesn't exist, select LAN.
702 */
703
704static u16 sis900_default_phy(struct net_device * net_dev)
705{
706 struct sis900_private * sis_priv = net_dev->priv;
707 struct mii_phy *phy = NULL, *phy_home = NULL,
708 *default_phy = NULL, *phy_lan = NULL;
709 u16 status;
710
711 for (phy=sis_priv->first_mii; phy; phy=phy->next) {
712 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
713 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
714
715 /* Link ON & Not select default PHY & not ghost PHY */
716 if ((status & MII_STAT_LINK) && !default_phy &&
717 (phy->phy_types != UNKNOWN))
718 default_phy = phy;
719 else {
720 status = mdio_read(net_dev, phy->phy_addr, MII_CONTROL);
721 mdio_write(net_dev, phy->phy_addr, MII_CONTROL,
722 status | MII_CNTL_AUTO | MII_CNTL_ISOLATE);
723 if (phy->phy_types == HOME)
724 phy_home = phy;
725 else if(phy->phy_types == LAN)
726 phy_lan = phy;
727 }
728 }
729
730 if (!default_phy && phy_home)
731 default_phy = phy_home;
732 else if (!default_phy && phy_lan)
733 default_phy = phy_lan;
734 else if (!default_phy)
735 default_phy = sis_priv->first_mii;
736
737 if (sis_priv->mii != default_phy) {
738 sis_priv->mii = default_phy;
739 sis_priv->cur_phy = default_phy->phy_addr;
740 printk(KERN_INFO "%s: Using transceiver found at address %d as default\n",
741 pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
742 }
743
Daniele Venzanoda369b02005-05-12 20:13:14 -0400744 sis_priv->mii_info.phy_id = sis_priv->cur_phy;
745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
747 status &= (~MII_CNTL_ISOLATE);
748
749 mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, status);
750 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
751 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
752
753 return status;
754}
755
756
757/**
758 * sis900_set_capability - set the media capability of network adapter.
759 * @net_dev : the net device to probe for
760 * @phy : default PHY
761 *
762 * Set the media capability of network adapter according to
763 * mii status register. It's necessary before auto-negotiate.
764 */
765
766static void sis900_set_capability(struct net_device *net_dev, struct mii_phy *phy)
767{
768 u16 cap;
769 u16 status;
770
771 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
772 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
773
774 cap = MII_NWAY_CSMA_CD |
775 ((phy->status & MII_STAT_CAN_TX_FDX)? MII_NWAY_TX_FDX:0) |
776 ((phy->status & MII_STAT_CAN_TX) ? MII_NWAY_TX:0) |
777 ((phy->status & MII_STAT_CAN_T_FDX) ? MII_NWAY_T_FDX:0)|
778 ((phy->status & MII_STAT_CAN_T) ? MII_NWAY_T:0);
779
780 mdio_write(net_dev, phy->phy_addr, MII_ANADV, cap);
781}
782
783
784/* Delay between EEPROM clock transitions. */
785#define eeprom_delay() inl(ee_addr)
786
787/**
788 * read_eeprom - Read Serial EEPROM
789 * @ioaddr: base i/o address
790 * @location: the EEPROM location to read
791 *
792 * Read Serial EEPROM through EEPROM Access Register.
793 * Note that location is in word (16 bits) unit
794 */
795
796static u16 __devinit read_eeprom(long ioaddr, int location)
797{
798 int i;
799 u16 retval = 0;
800 long ee_addr = ioaddr + mear;
801 u32 read_cmd = location | EEread;
802
803 outl(0, ee_addr);
804 eeprom_delay();
805 outl(EECS, ee_addr);
806 eeprom_delay();
807
808 /* Shift the read command (9) bits out. */
809 for (i = 8; i >= 0; i--) {
810 u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
811 outl(dataval, ee_addr);
812 eeprom_delay();
813 outl(dataval | EECLK, ee_addr);
814 eeprom_delay();
815 }
816 outl(EECS, ee_addr);
817 eeprom_delay();
818
819 /* read the 16-bits data in */
820 for (i = 16; i > 0; i--) {
821 outl(EECS, ee_addr);
822 eeprom_delay();
823 outl(EECS | EECLK, ee_addr);
824 eeprom_delay();
825 retval = (retval << 1) | ((inl(ee_addr) & EEDO) ? 1 : 0);
826 eeprom_delay();
827 }
828
829 /* Terminate the EEPROM access. */
830 outl(0, ee_addr);
831 eeprom_delay();
832
833 return (retval);
834}
835
836/* Read and write the MII management registers using software-generated
837 serial MDIO protocol. Note that the command bits and data bits are
838 send out separately */
839#define mdio_delay() inl(mdio_addr)
840
841static void mdio_idle(long mdio_addr)
842{
843 outl(MDIO | MDDIR, mdio_addr);
844 mdio_delay();
845 outl(MDIO | MDDIR | MDC, mdio_addr);
846}
847
848/* Syncronize the MII management interface by shifting 32 one bits out. */
849static void mdio_reset(long mdio_addr)
850{
851 int i;
852
853 for (i = 31; i >= 0; i--) {
854 outl(MDDIR | MDIO, mdio_addr);
855 mdio_delay();
856 outl(MDDIR | MDIO | MDC, mdio_addr);
857 mdio_delay();
858 }
859 return;
860}
861
862/**
863 * mdio_read - read MII PHY register
864 * @net_dev: the net device to read
865 * @phy_id: the phy address to read
866 * @location: the phy regiester id to read
867 *
868 * Read MII registers through MDIO and MDC
869 * using MDIO management frame structure and protocol(defined by ISO/IEC).
870 * Please see SiS7014 or ICS spec
871 */
872
Daniele Venzanoda369b02005-05-12 20:13:14 -0400873static int mdio_read(struct net_device *net_dev, int phy_id, int location)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874{
875 long mdio_addr = net_dev->base_addr + mear;
876 int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
877 u16 retval = 0;
878 int i;
879
880 mdio_reset(mdio_addr);
881 mdio_idle(mdio_addr);
882
883 for (i = 15; i >= 0; i--) {
884 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
885 outl(dataval, mdio_addr);
886 mdio_delay();
887 outl(dataval | MDC, mdio_addr);
888 mdio_delay();
889 }
890
891 /* Read the 16 data bits. */
892 for (i = 16; i > 0; i--) {
893 outl(0, mdio_addr);
894 mdio_delay();
895 retval = (retval << 1) | ((inl(mdio_addr) & MDIO) ? 1 : 0);
896 outl(MDC, mdio_addr);
897 mdio_delay();
898 }
899 outl(0x00, mdio_addr);
900
901 return retval;
902}
903
904/**
905 * mdio_write - write MII PHY register
906 * @net_dev: the net device to write
907 * @phy_id: the phy address to write
908 * @location: the phy regiester id to write
909 * @value: the register value to write with
910 *
911 * Write MII registers with @value through MDIO and MDC
912 * using MDIO management frame structure and protocol(defined by ISO/IEC)
913 * please see SiS7014 or ICS spec
914 */
915
916static void mdio_write(struct net_device *net_dev, int phy_id, int location,
917 int value)
918{
919 long mdio_addr = net_dev->base_addr + mear;
920 int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
921 int i;
922
923 mdio_reset(mdio_addr);
924 mdio_idle(mdio_addr);
925
926 /* Shift the command bits out. */
927 for (i = 15; i >= 0; i--) {
928 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
929 outb(dataval, mdio_addr);
930 mdio_delay();
931 outb(dataval | MDC, mdio_addr);
932 mdio_delay();
933 }
934 mdio_delay();
935
936 /* Shift the value bits out. */
937 for (i = 15; i >= 0; i--) {
938 int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
939 outl(dataval, mdio_addr);
940 mdio_delay();
941 outl(dataval | MDC, mdio_addr);
942 mdio_delay();
943 }
944 mdio_delay();
945
946 /* Clear out extra bits. */
947 for (i = 2; i > 0; i--) {
948 outb(0, mdio_addr);
949 mdio_delay();
950 outb(MDC, mdio_addr);
951 mdio_delay();
952 }
953 outl(0x00, mdio_addr);
954
955 return;
956}
957
958
959/**
960 * sis900_reset_phy - reset sis900 mii phy.
961 * @net_dev: the net device to write
962 * @phy_addr: default phy address
963 *
964 * Some specific phy can't work properly without reset.
965 * This function will be called during initialization and
966 * link status change from ON to DOWN.
967 */
968
969static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
970{
971 int i = 0;
972 u16 status;
973
974 while (i++ < 2)
975 status = mdio_read(net_dev, phy_addr, MII_STATUS);
976
977 mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
978
979 return status;
980}
981
982#ifdef CONFIG_NET_POLL_CONTROLLER
983/*
984 * Polling 'interrupt' - used by things like netconsole to send skbs
985 * without having to re-enable interrupts. It's not called while
986 * the interrupt routine is executing.
987*/
988static void sis900_poll(struct net_device *dev)
989{
990 disable_irq(dev->irq);
991 sis900_interrupt(dev->irq, dev, NULL);
992 enable_irq(dev->irq);
993}
994#endif
995
996/**
997 * sis900_open - open sis900 device
998 * @net_dev: the net device to open
999 *
1000 * Do some initialization and start net interface.
1001 * enable interrupts and set sis900 timer.
1002 */
1003
1004static int
1005sis900_open(struct net_device *net_dev)
1006{
1007 struct sis900_private *sis_priv = net_dev->priv;
1008 long ioaddr = net_dev->base_addr;
1009 int ret;
1010
1011 /* Soft reset the chip. */
1012 sis900_reset(net_dev);
1013
1014 /* Equalizer workaround Rule */
1015 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1016
Thomas Gleixner1fb9df52006-07-01 19:29:39 -07001017 ret = request_irq(net_dev->irq, &sis900_interrupt, IRQF_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 net_dev->name, net_dev);
1019 if (ret)
1020 return ret;
1021
1022 sis900_init_rxfilter(net_dev);
1023
1024 sis900_init_tx_ring(net_dev);
1025 sis900_init_rx_ring(net_dev);
1026
1027 set_rx_mode(net_dev);
1028
1029 netif_start_queue(net_dev);
1030
1031 /* Workaround for EDB */
1032 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
1033
1034 /* Enable all known interrupts by setting the interrupt mask. */
1035 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1036 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
1037 outl(IE, ioaddr + ier);
1038
1039 sis900_check_mode(net_dev, sis_priv->mii);
1040
1041 /* Set the timer to switch to check for link beat and perhaps switch
1042 to an alternate media type. */
1043 init_timer(&sis_priv->timer);
1044 sis_priv->timer.expires = jiffies + HZ;
1045 sis_priv->timer.data = (unsigned long)net_dev;
1046 sis_priv->timer.function = &sis900_timer;
1047 add_timer(&sis_priv->timer);
1048
1049 return 0;
1050}
1051
1052/**
1053 * sis900_init_rxfilter - Initialize the Rx filter
1054 * @net_dev: the net device to initialize for
1055 *
1056 * Set receive filter address to our MAC address
1057 * and enable packet filtering.
1058 */
1059
1060static void
1061sis900_init_rxfilter (struct net_device * net_dev)
1062{
1063 struct sis900_private *sis_priv = net_dev->priv;
1064 long ioaddr = net_dev->base_addr;
1065 u32 rfcrSave;
1066 u32 i;
1067
1068 rfcrSave = inl(rfcr + ioaddr);
1069
1070 /* disable packet filtering before setting filter */
1071 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
1072
1073 /* load MAC addr to filter data register */
1074 for (i = 0 ; i < 3 ; i++) {
1075 u32 w;
1076
1077 w = (u32) *((u16 *)(net_dev->dev_addr)+i);
1078 outl((i << RFADDR_shift), ioaddr + rfcr);
1079 outl(w, ioaddr + rfdr);
1080
1081 if (netif_msg_hw(sis_priv)) {
1082 printk(KERN_DEBUG "%s: Receive Filter Addrss[%d]=%x\n",
1083 net_dev->name, i, inl(ioaddr + rfdr));
1084 }
1085 }
1086
1087 /* enable packet filtering */
1088 outl(rfcrSave | RFEN, rfcr + ioaddr);
1089}
1090
1091/**
1092 * sis900_init_tx_ring - Initialize the Tx descriptor ring
1093 * @net_dev: the net device to initialize for
1094 *
1095 * Initialize the Tx descriptor ring,
1096 */
1097
1098static void
1099sis900_init_tx_ring(struct net_device *net_dev)
1100{
1101 struct sis900_private *sis_priv = net_dev->priv;
1102 long ioaddr = net_dev->base_addr;
1103 int i;
1104
1105 sis_priv->tx_full = 0;
1106 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1107
1108 for (i = 0; i < NUM_TX_DESC; i++) {
1109 sis_priv->tx_skbuff[i] = NULL;
1110
1111 sis_priv->tx_ring[i].link = sis_priv->tx_ring_dma +
1112 ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
1113 sis_priv->tx_ring[i].cmdsts = 0;
1114 sis_priv->tx_ring[i].bufptr = 0;
1115 }
1116
1117 /* load Transmit Descriptor Register */
1118 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1119 if (netif_msg_hw(sis_priv))
1120 printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
1121 net_dev->name, inl(ioaddr + txdp));
1122}
1123
1124/**
1125 * sis900_init_rx_ring - Initialize the Rx descriptor ring
1126 * @net_dev: the net device to initialize for
1127 *
1128 * Initialize the Rx descriptor ring,
1129 * and pre-allocate recevie buffers (socket buffer)
1130 */
1131
1132static void
1133sis900_init_rx_ring(struct net_device *net_dev)
1134{
1135 struct sis900_private *sis_priv = net_dev->priv;
1136 long ioaddr = net_dev->base_addr;
1137 int i;
1138
1139 sis_priv->cur_rx = 0;
1140 sis_priv->dirty_rx = 0;
1141
1142 /* init RX descriptor */
1143 for (i = 0; i < NUM_RX_DESC; i++) {
1144 sis_priv->rx_skbuff[i] = NULL;
1145
1146 sis_priv->rx_ring[i].link = sis_priv->rx_ring_dma +
1147 ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
1148 sis_priv->rx_ring[i].cmdsts = 0;
1149 sis_priv->rx_ring[i].bufptr = 0;
1150 }
1151
1152 /* allocate sock buffers */
1153 for (i = 0; i < NUM_RX_DESC; i++) {
1154 struct sk_buff *skb;
1155
1156 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1157 /* not enough memory for skbuff, this makes a "hole"
1158 on the buffer ring, it is not clear how the
1159 hardware will react to this kind of degenerated
1160 buffer */
1161 break;
1162 }
1163 skb->dev = net_dev;
1164 sis_priv->rx_skbuff[i] = skb;
1165 sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
1166 sis_priv->rx_ring[i].bufptr = pci_map_single(sis_priv->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001167 skb->data, RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 }
1169 sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
1170
1171 /* load Receive Descriptor Register */
1172 outl(sis_priv->rx_ring_dma, ioaddr + rxdp);
1173 if (netif_msg_hw(sis_priv))
1174 printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
1175 net_dev->name, inl(ioaddr + rxdp));
1176}
1177
1178/**
1179 * sis630_set_eq - set phy equalizer value for 630 LAN
1180 * @net_dev: the net device to set equalizer value
1181 * @revision: 630 LAN revision number
1182 *
1183 * 630E equalizer workaround rule(Cyrus Huang 08/15)
1184 * PHY register 14h(Test)
1185 * Bit 14: 0 -- Automatically dectect (default)
1186 * 1 -- Manually set Equalizer filter
1187 * Bit 13: 0 -- (Default)
1188 * 1 -- Speed up convergence of equalizer setting
1189 * Bit 9 : 0 -- (Default)
1190 * 1 -- Disable Baseline Wander
1191 * Bit 3~7 -- Equalizer filter setting
1192 * Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
1193 * Then calculate equalizer value
1194 * Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
1195 * Link Off:Set Bit 13 to 1, Bit 14 to 0
1196 * Calculate Equalizer value:
1197 * When Link is ON and Bit 14 is 0, SIS900PHY will auto-dectect proper equalizer value.
1198 * When the equalizer is stable, this value is not a fixed value. It will be within
1199 * a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
1200 * 0 <= max <= 4 --> set equalizer to max
1201 * 5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
1202 * max >= 15 --> set equalizer to max+5 or set equalizer to max+6 if max == min
1203 */
1204
1205static void sis630_set_eq(struct net_device *net_dev, u8 revision)
1206{
1207 struct sis900_private *sis_priv = net_dev->priv;
1208 u16 reg14h, eq_value=0, max_value=0, min_value=0;
1209 int i, maxcount=10;
1210
1211 if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1212 revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
1213 return;
1214
1215 if (netif_carrier_ok(net_dev)) {
1216 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1217 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1218 (0x2200 | reg14h) & 0xBFFF);
1219 for (i=0; i < maxcount; i++) {
1220 eq_value = (0x00F8 & mdio_read(net_dev,
1221 sis_priv->cur_phy, MII_RESV)) >> 3;
1222 if (i == 0)
1223 max_value=min_value=eq_value;
1224 max_value = (eq_value > max_value) ?
1225 eq_value : max_value;
1226 min_value = (eq_value < min_value) ?
1227 eq_value : min_value;
1228 }
1229 /* 630E rule to determine the equalizer value */
1230 if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1231 revision == SIS630ET_900_REV) {
1232 if (max_value < 5)
1233 eq_value = max_value;
1234 else if (max_value >= 5 && max_value < 15)
1235 eq_value = (max_value == min_value) ?
1236 max_value+2 : max_value+1;
1237 else if (max_value >= 15)
1238 eq_value=(max_value == min_value) ?
1239 max_value+6 : max_value+5;
1240 }
1241 /* 630B0&B1 rule to determine the equalizer value */
1242 if (revision == SIS630A_900_REV &&
1243 (sis_priv->host_bridge_rev == SIS630B0 ||
1244 sis_priv->host_bridge_rev == SIS630B1)) {
1245 if (max_value == 0)
1246 eq_value = 3;
1247 else
1248 eq_value = (max_value + min_value + 1)/2;
1249 }
1250 /* write equalizer value and setting */
1251 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1252 reg14h = (reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
1253 reg14h = (reg14h | 0x6000) & 0xFDFF;
1254 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
1255 } else {
1256 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1257 if (revision == SIS630A_900_REV &&
1258 (sis_priv->host_bridge_rev == SIS630B0 ||
1259 sis_priv->host_bridge_rev == SIS630B1))
1260 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1261 (reg14h | 0x2200) & 0xBFFF);
1262 else
1263 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1264 (reg14h | 0x2000) & 0xBFFF);
1265 }
1266 return;
1267}
1268
1269/**
1270 * sis900_timer - sis900 timer routine
1271 * @data: pointer to sis900 net device
1272 *
1273 * On each timer ticks we check two things,
1274 * link status (ON/OFF) and link mode (10/100/Full/Half)
1275 */
1276
1277static void sis900_timer(unsigned long data)
1278{
1279 struct net_device *net_dev = (struct net_device *)data;
1280 struct sis900_private *sis_priv = net_dev->priv;
1281 struct mii_phy *mii_phy = sis_priv->mii;
Arjan van de Venf71e1302006-03-03 21:33:57 -05001282 static const int next_tick = 5*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 u16 status;
1284
1285 if (!sis_priv->autong_complete){
1286 int speed, duplex = 0;
1287
1288 sis900_read_mode(net_dev, &speed, &duplex);
1289 if (duplex){
1290 sis900_set_mode(net_dev->base_addr, speed, duplex);
1291 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1292 netif_start_queue(net_dev);
1293 }
1294
1295 sis_priv->timer.expires = jiffies + HZ;
1296 add_timer(&sis_priv->timer);
1297 return;
1298 }
1299
1300 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1301 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1302
1303 /* Link OFF -> ON */
1304 if (!netif_carrier_ok(net_dev)) {
1305 LookForLink:
1306 /* Search for new PHY */
1307 status = sis900_default_phy(net_dev);
1308 mii_phy = sis_priv->mii;
1309
1310 if (status & MII_STAT_LINK){
1311 sis900_check_mode(net_dev, mii_phy);
1312 netif_carrier_on(net_dev);
1313 }
1314 } else {
1315 /* Link ON -> OFF */
1316 if (!(status & MII_STAT_LINK)){
1317 netif_carrier_off(net_dev);
1318 if(netif_msg_link(sis_priv))
1319 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1320
1321 /* Change mode issue */
1322 if ((mii_phy->phy_id0 == 0x001D) &&
1323 ((mii_phy->phy_id1 & 0xFFF0) == 0x8000))
1324 sis900_reset_phy(net_dev, sis_priv->cur_phy);
1325
1326 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1327
1328 goto LookForLink;
1329 }
1330 }
1331
1332 sis_priv->timer.expires = jiffies + next_tick;
1333 add_timer(&sis_priv->timer);
1334}
1335
1336/**
1337 * sis900_check_mode - check the media mode for sis900
1338 * @net_dev: the net device to be checked
1339 * @mii_phy: the mii phy
1340 *
1341 * Older driver gets the media mode from mii status output
1342 * register. Now we set our media capability and auto-negotiate
1343 * to get the upper bound of speed and duplex between two ends.
1344 * If the types of mii phy is HOME, it doesn't need to auto-negotiate
1345 * and autong_complete should be set to 1.
1346 */
1347
1348static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
1349{
1350 struct sis900_private *sis_priv = net_dev->priv;
1351 long ioaddr = net_dev->base_addr;
1352 int speed, duplex;
1353
1354 if (mii_phy->phy_types == LAN) {
1355 outl(~EXD & inl(ioaddr + cfg), ioaddr + cfg);
1356 sis900_set_capability(net_dev , mii_phy);
1357 sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
1358 } else {
1359 outl(EXD | inl(ioaddr + cfg), ioaddr + cfg);
1360 speed = HW_SPEED_HOME;
1361 duplex = FDX_CAPABLE_HALF_SELECTED;
1362 sis900_set_mode(ioaddr, speed, duplex);
1363 sis_priv->autong_complete = 1;
1364 }
1365}
1366
1367/**
1368 * sis900_set_mode - Set the media mode of mac register.
1369 * @ioaddr: the address of the device
1370 * @speed : the transmit speed to be determined
1371 * @duplex: the duplex mode to be determined
1372 *
1373 * Set the media mode of mac register txcfg/rxcfg according to
1374 * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
1375 * bus is used instead of PCI bus. When this bit is set 1, the
1376 * Max DMA Burst Size for TX/RX DMA should be no larger than 16
1377 * double words.
1378 */
1379
1380static void sis900_set_mode (long ioaddr, int speed, int duplex)
1381{
1382 u32 tx_flags = 0, rx_flags = 0;
1383
1384 if (inl(ioaddr + cfg) & EDB_MASTER_EN) {
1385 tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) |
1386 (TX_FILL_THRESH << TxFILLT_shift);
1387 rx_flags = DMA_BURST_64 << RxMXDMA_shift;
1388 } else {
1389 tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) |
1390 (TX_FILL_THRESH << TxFILLT_shift);
1391 rx_flags = DMA_BURST_512 << RxMXDMA_shift;
1392 }
1393
1394 if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS) {
1395 rx_flags |= (RxDRNT_10 << RxDRNT_shift);
1396 tx_flags |= (TxDRNT_10 << TxDRNT_shift);
1397 } else {
1398 rx_flags |= (RxDRNT_100 << RxDRNT_shift);
1399 tx_flags |= (TxDRNT_100 << TxDRNT_shift);
1400 }
1401
1402 if (duplex == FDX_CAPABLE_FULL_SELECTED) {
1403 tx_flags |= (TxCSI | TxHBI);
1404 rx_flags |= RxATX;
1405 }
1406
Daniele Venzanod269a692006-04-17 10:28:06 +02001407#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1408 /* Can accept Jumbo packet */
1409 rx_flags |= RxAJAB;
1410#endif
1411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 outl (tx_flags, ioaddr + txcfg);
1413 outl (rx_flags, ioaddr + rxcfg);
1414}
1415
1416/**
1417 * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
1418 * @net_dev: the net device to read mode for
1419 * @phy_addr: mii phy address
1420 *
1421 * If the adapter is link-on, set the auto-negotiate enable/reset bit.
1422 * autong_complete should be set to 0 when starting auto-negotiation.
1423 * autong_complete should be set to 1 if we didn't start auto-negotiation.
1424 * sis900_timer will wait for link on again if autong_complete = 0.
1425 */
1426
1427static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
1428{
1429 struct sis900_private *sis_priv = net_dev->priv;
1430 int i = 0;
1431 u32 status;
1432
1433 while (i++ < 2)
1434 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1435
1436 if (!(status & MII_STAT_LINK)){
1437 if(netif_msg_link(sis_priv))
1438 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1439 sis_priv->autong_complete = 1;
1440 netif_carrier_off(net_dev);
1441 return;
1442 }
1443
1444 /* (Re)start AutoNegotiate */
1445 mdio_write(net_dev, phy_addr, MII_CONTROL,
1446 MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
1447 sis_priv->autong_complete = 0;
1448}
1449
1450
1451/**
1452 * sis900_read_mode - read media mode for sis900 internal phy
1453 * @net_dev: the net device to read mode for
1454 * @speed : the transmit speed to be determined
1455 * @duplex : the duplex mode to be determined
1456 *
1457 * The capability of remote end will be put in mii register autorec
1458 * after auto-negotiation. Use AND operation to get the upper bound
1459 * of speed and duplex between two ends.
1460 */
1461
1462static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
1463{
1464 struct sis900_private *sis_priv = net_dev->priv;
1465 struct mii_phy *phy = sis_priv->mii;
1466 int phy_addr = sis_priv->cur_phy;
1467 u32 status;
1468 u16 autoadv, autorec;
1469 int i = 0;
1470
1471 while (i++ < 2)
1472 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1473
1474 if (!(status & MII_STAT_LINK))
1475 return;
1476
1477 /* AutoNegotiate completed */
1478 autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
1479 autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
1480 status = autoadv & autorec;
1481
1482 *speed = HW_SPEED_10_MBPS;
1483 *duplex = FDX_CAPABLE_HALF_SELECTED;
1484
1485 if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
1486 *speed = HW_SPEED_100_MBPS;
1487 if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
1488 *duplex = FDX_CAPABLE_FULL_SELECTED;
1489
1490 sis_priv->autong_complete = 1;
1491
1492 /* Workaround for Realtek RTL8201 PHY issue */
1493 if ((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)) {
1494 if (mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
1495 *duplex = FDX_CAPABLE_FULL_SELECTED;
1496 if (mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
1497 *speed = HW_SPEED_100_MBPS;
1498 }
1499
1500 if(netif_msg_link(sis_priv))
1501 printk(KERN_INFO "%s: Media Link On %s %s-duplex \n",
1502 net_dev->name,
1503 *speed == HW_SPEED_100_MBPS ?
1504 "100mbps" : "10mbps",
1505 *duplex == FDX_CAPABLE_FULL_SELECTED ?
1506 "full" : "half");
1507}
1508
1509/**
1510 * sis900_tx_timeout - sis900 transmit timeout routine
1511 * @net_dev: the net device to transmit
1512 *
1513 * print transmit timeout status
1514 * disable interrupts and do some tasks
1515 */
1516
1517static void sis900_tx_timeout(struct net_device *net_dev)
1518{
1519 struct sis900_private *sis_priv = net_dev->priv;
1520 long ioaddr = net_dev->base_addr;
1521 unsigned long flags;
1522 int i;
1523
1524 if(netif_msg_tx_err(sis_priv))
1525 printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x \n",
1526 net_dev->name, inl(ioaddr + cr), inl(ioaddr + isr));
1527
1528 /* Disable interrupts by clearing the interrupt mask. */
1529 outl(0x0000, ioaddr + imr);
1530
1531 /* use spinlock to prevent interrupt handler accessing buffer ring */
1532 spin_lock_irqsave(&sis_priv->lock, flags);
1533
1534 /* discard unsent packets */
1535 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1536 for (i = 0; i < NUM_TX_DESC; i++) {
1537 struct sk_buff *skb = sis_priv->tx_skbuff[i];
1538
1539 if (skb) {
1540 pci_unmap_single(sis_priv->pci_dev,
1541 sis_priv->tx_ring[i].bufptr, skb->len,
1542 PCI_DMA_TODEVICE);
1543 dev_kfree_skb_irq(skb);
1544 sis_priv->tx_skbuff[i] = NULL;
1545 sis_priv->tx_ring[i].cmdsts = 0;
1546 sis_priv->tx_ring[i].bufptr = 0;
1547 sis_priv->stats.tx_dropped++;
1548 }
1549 }
1550 sis_priv->tx_full = 0;
1551 netif_wake_queue(net_dev);
1552
1553 spin_unlock_irqrestore(&sis_priv->lock, flags);
1554
1555 net_dev->trans_start = jiffies;
1556
1557 /* load Transmit Descriptor Register */
1558 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1559
1560 /* Enable all known interrupts by setting the interrupt mask. */
1561 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1562 return;
1563}
1564
1565/**
1566 * sis900_start_xmit - sis900 start transmit routine
1567 * @skb: socket buffer pointer to put the data being transmitted
1568 * @net_dev: the net device to transmit with
1569 *
1570 * Set the transmit buffer descriptor,
1571 * and write TxENA to enable transmit state machine.
1572 * tell upper layer if the buffer is full
1573 */
1574
1575static int
1576sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
1577{
1578 struct sis900_private *sis_priv = net_dev->priv;
1579 long ioaddr = net_dev->base_addr;
1580 unsigned int entry;
1581 unsigned long flags;
1582 unsigned int index_cur_tx, index_dirty_tx;
1583 unsigned int count_dirty_tx;
1584
1585 /* Don't transmit data before the complete of auto-negotiation */
1586 if(!sis_priv->autong_complete){
1587 netif_stop_queue(net_dev);
1588 return 1;
1589 }
1590
1591 spin_lock_irqsave(&sis_priv->lock, flags);
1592
1593 /* Calculate the next Tx descriptor entry. */
1594 entry = sis_priv->cur_tx % NUM_TX_DESC;
1595 sis_priv->tx_skbuff[entry] = skb;
1596
1597 /* set the transmit buffer descriptor and enable Transmit State Machine */
1598 sis_priv->tx_ring[entry].bufptr = pci_map_single(sis_priv->pci_dev,
1599 skb->data, skb->len, PCI_DMA_TODEVICE);
1600 sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
1601 outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
1602
1603 sis_priv->cur_tx ++;
1604 index_cur_tx = sis_priv->cur_tx;
1605 index_dirty_tx = sis_priv->dirty_tx;
1606
1607 for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
1608 count_dirty_tx ++;
1609
1610 if (index_cur_tx == index_dirty_tx) {
1611 /* dirty_tx is met in the cycle of cur_tx, buffer full */
1612 sis_priv->tx_full = 1;
1613 netif_stop_queue(net_dev);
1614 } else if (count_dirty_tx < NUM_TX_DESC) {
1615 /* Typical path, tell upper layer that more transmission is possible */
1616 netif_start_queue(net_dev);
1617 } else {
1618 /* buffer full, tell upper layer no more transmission */
1619 sis_priv->tx_full = 1;
1620 netif_stop_queue(net_dev);
1621 }
1622
1623 spin_unlock_irqrestore(&sis_priv->lock, flags);
1624
1625 net_dev->trans_start = jiffies;
1626
1627 if (netif_msg_tx_queued(sis_priv))
1628 printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
1629 "to slot %d.\n",
1630 net_dev->name, skb->data, (int)skb->len, entry);
1631
1632 return 0;
1633}
1634
1635/**
1636 * sis900_interrupt - sis900 interrupt handler
1637 * @irq: the irq number
1638 * @dev_instance: the client data object
1639 * @regs: snapshot of processor context
1640 *
1641 * The interrupt handler does all of the Rx thread work,
1642 * and cleans up after the Tx thread
1643 */
1644
1645static irqreturn_t sis900_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
1646{
1647 struct net_device *net_dev = dev_instance;
1648 struct sis900_private *sis_priv = net_dev->priv;
1649 int boguscnt = max_interrupt_work;
1650 long ioaddr = net_dev->base_addr;
1651 u32 status;
1652 unsigned int handled = 0;
1653
1654 spin_lock (&sis_priv->lock);
1655
1656 do {
1657 status = inl(ioaddr + isr);
1658
1659 if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0)
1660 /* nothing intresting happened */
1661 break;
1662 handled = 1;
1663
1664 /* why dow't we break after Tx/Rx case ?? keyword: full-duplex */
1665 if (status & (RxORN | RxERR | RxOK))
1666 /* Rx interrupt */
1667 sis900_rx(net_dev);
1668
1669 if (status & (TxURN | TxERR | TxIDLE))
1670 /* Tx interrupt */
1671 sis900_finish_xmit(net_dev);
1672
1673 /* something strange happened !!! */
1674 if (status & HIBERR) {
1675 if(netif_msg_intr(sis_priv))
1676 printk(KERN_INFO "%s: Abnormal interrupt,"
1677 "status %#8.8x.\n", net_dev->name, status);
1678 break;
1679 }
1680 if (--boguscnt < 0) {
1681 if(netif_msg_intr(sis_priv))
1682 printk(KERN_INFO "%s: Too much work at interrupt, "
1683 "interrupt status = %#8.8x.\n",
1684 net_dev->name, status);
1685 break;
1686 }
1687 } while (1);
1688
1689 if(netif_msg_intr(sis_priv))
1690 printk(KERN_DEBUG "%s: exiting interrupt, "
1691 "interrupt status = 0x%#8.8x.\n",
1692 net_dev->name, inl(ioaddr + isr));
1693
1694 spin_unlock (&sis_priv->lock);
1695 return IRQ_RETVAL(handled);
1696}
1697
1698/**
1699 * sis900_rx - sis900 receive routine
1700 * @net_dev: the net device which receives data
1701 *
1702 * Process receive interrupt events,
1703 * put buffer to higher layer and refill buffer pool
Akinobu Mita0b280022006-03-26 01:38:58 -08001704 * Note: This function is called by interrupt handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 * don't do "too much" work here
1706 */
1707
1708static int sis900_rx(struct net_device *net_dev)
1709{
1710 struct sis900_private *sis_priv = net_dev->priv;
1711 long ioaddr = net_dev->base_addr;
1712 unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
1713 u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
Vasily Averin7380a78a2005-10-28 16:46:35 -04001714 int rx_work_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715
1716 if (netif_msg_rx_status(sis_priv))
1717 printk(KERN_DEBUG "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
1718 "status:0x%8.8x\n",
1719 sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
Vasily Averin7380a78a2005-10-28 16:46:35 -04001720 rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721
1722 while (rx_status & OWN) {
1723 unsigned int rx_size;
Daniele Venzanod269a692006-04-17 10:28:06 +02001724 unsigned int data_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
Vasily Averin7380a78a2005-10-28 16:46:35 -04001726 if (--rx_work_limit < 0)
1727 break;
1728
Daniele Venzanod269a692006-04-17 10:28:06 +02001729 data_size = rx_status & DSIZE;
1730 rx_size = data_size - CRC_SIZE;
1731
1732#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1733 /* ``TOOLONG'' flag means jumbo packet recived. */
1734 if ((rx_status & TOOLONG) && data_size <= MAX_FRAME_SIZE)
1735 rx_status &= (~ ((unsigned int)TOOLONG));
1736#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
1738 if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
1739 /* corrupted packet received */
1740 if (netif_msg_rx_err(sis_priv))
1741 printk(KERN_DEBUG "%s: Corrupted packet "
Daniele Venzanod269a692006-04-17 10:28:06 +02001742 "received, buffer status = 0x%8.8x/%d.\n",
1743 net_dev->name, rx_status, data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 sis_priv->stats.rx_errors++;
1745 if (rx_status & OVERRUN)
1746 sis_priv->stats.rx_over_errors++;
1747 if (rx_status & (TOOLONG|RUNT))
1748 sis_priv->stats.rx_length_errors++;
1749 if (rx_status & (RXISERR | FAERR))
1750 sis_priv->stats.rx_frame_errors++;
1751 if (rx_status & CRCERR)
1752 sis_priv->stats.rx_crc_errors++;
1753 /* reset buffer descriptor state */
1754 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1755 } else {
1756 struct sk_buff * skb;
1757
1758 /* This situation should never happen, but due to
1759 some unknow bugs, it is possible that
1760 we are working on NULL sk_buff :-( */
1761 if (sis_priv->rx_skbuff[entry] == NULL) {
1762 if (netif_msg_rx_err(sis_priv))
Vasily Averin7380a78a2005-10-28 16:46:35 -04001763 printk(KERN_WARNING "%s: NULL pointer "
1764 "encountered in Rx ring\n"
1765 "cur_rx:%4.4d, dirty_rx:%4.4d\n",
1766 net_dev->name, sis_priv->cur_rx,
1767 sis_priv->dirty_rx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 break;
1769 }
1770
1771 pci_unmap_single(sis_priv->pci_dev,
1772 sis_priv->rx_ring[entry].bufptr, RX_BUF_SIZE,
1773 PCI_DMA_FROMDEVICE);
1774 /* give the socket buffer to upper layers */
1775 skb = sis_priv->rx_skbuff[entry];
1776 skb_put(skb, rx_size);
1777 skb->protocol = eth_type_trans(skb, net_dev);
1778 netif_rx(skb);
1779
1780 /* some network statistics */
1781 if ((rx_status & BCAST) == MCAST)
1782 sis_priv->stats.multicast++;
1783 net_dev->last_rx = jiffies;
1784 sis_priv->stats.rx_bytes += rx_size;
1785 sis_priv->stats.rx_packets++;
1786
1787 /* refill the Rx buffer, what if there is not enought
1788 * memory for new socket buffer ?? */
1789 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1790 /* not enough memory for skbuff, this makes a
1791 * "hole" on the buffer ring, it is not clear
1792 * how the hardware will react to this kind
1793 * of degenerated buffer */
1794 if (netif_msg_rx_status(sis_priv))
1795 printk(KERN_INFO "%s: Memory squeeze,"
1796 "deferring packet.\n",
1797 net_dev->name);
1798 sis_priv->rx_skbuff[entry] = NULL;
1799 /* reset buffer descriptor state */
1800 sis_priv->rx_ring[entry].cmdsts = 0;
1801 sis_priv->rx_ring[entry].bufptr = 0;
1802 sis_priv->stats.rx_dropped++;
Vasily Averin7380a78a2005-10-28 16:46:35 -04001803 sis_priv->cur_rx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 break;
1805 }
1806 skb->dev = net_dev;
1807 sis_priv->rx_skbuff[entry] = skb;
1808 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1809 sis_priv->rx_ring[entry].bufptr =
David S. Miller689be432005-06-28 15:25:31 -07001810 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1812 sis_priv->dirty_rx++;
1813 }
1814 sis_priv->cur_rx++;
1815 entry = sis_priv->cur_rx % NUM_RX_DESC;
1816 rx_status = sis_priv->rx_ring[entry].cmdsts;
1817 } // while
1818
1819 /* refill the Rx buffer, what if the rate of refilling is slower
1820 * than consuming ?? */
Vasily Averin7380a78a2005-10-28 16:46:35 -04001821 for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 struct sk_buff *skb;
1823
1824 entry = sis_priv->dirty_rx % NUM_RX_DESC;
1825
1826 if (sis_priv->rx_skbuff[entry] == NULL) {
1827 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1828 /* not enough memory for skbuff, this makes a
1829 * "hole" on the buffer ring, it is not clear
1830 * how the hardware will react to this kind
1831 * of degenerated buffer */
1832 if (netif_msg_rx_err(sis_priv))
1833 printk(KERN_INFO "%s: Memory squeeze,"
1834 "deferring packet.\n",
1835 net_dev->name);
1836 sis_priv->stats.rx_dropped++;
1837 break;
1838 }
1839 skb->dev = net_dev;
1840 sis_priv->rx_skbuff[entry] = skb;
1841 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1842 sis_priv->rx_ring[entry].bufptr =
David S. Miller689be432005-06-28 15:25:31 -07001843 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1845 }
1846 }
1847 /* re-enable the potentially idle receive state matchine */
1848 outl(RxENA | inl(ioaddr + cr), ioaddr + cr );
1849
1850 return 0;
1851}
1852
1853/**
1854 * sis900_finish_xmit - finish up transmission of packets
1855 * @net_dev: the net device to be transmitted on
1856 *
1857 * Check for error condition and free socket buffer etc
1858 * schedule for more transmission as needed
Akinobu Mita0b280022006-03-26 01:38:58 -08001859 * Note: This function is called by interrupt handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 * don't do "too much" work here
1861 */
1862
1863static void sis900_finish_xmit (struct net_device *net_dev)
1864{
1865 struct sis900_private *sis_priv = net_dev->priv;
1866
1867 for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
1868 struct sk_buff *skb;
1869 unsigned int entry;
1870 u32 tx_status;
1871
1872 entry = sis_priv->dirty_tx % NUM_TX_DESC;
1873 tx_status = sis_priv->tx_ring[entry].cmdsts;
1874
1875 if (tx_status & OWN) {
1876 /* The packet is not transmitted yet (owned by hardware) !
1877 * Note: the interrupt is generated only when Tx Machine
1878 * is idle, so this is an almost impossible case */
1879 break;
1880 }
1881
1882 if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
1883 /* packet unsuccessfully transmitted */
1884 if (netif_msg_tx_err(sis_priv))
1885 printk(KERN_DEBUG "%s: Transmit "
1886 "error, Tx status %8.8x.\n",
1887 net_dev->name, tx_status);
1888 sis_priv->stats.tx_errors++;
1889 if (tx_status & UNDERRUN)
1890 sis_priv->stats.tx_fifo_errors++;
1891 if (tx_status & ABORT)
1892 sis_priv->stats.tx_aborted_errors++;
1893 if (tx_status & NOCARRIER)
1894 sis_priv->stats.tx_carrier_errors++;
1895 if (tx_status & OWCOLL)
1896 sis_priv->stats.tx_window_errors++;
1897 } else {
1898 /* packet successfully transmitted */
1899 sis_priv->stats.collisions += (tx_status & COLCNT) >> 16;
1900 sis_priv->stats.tx_bytes += tx_status & DSIZE;
1901 sis_priv->stats.tx_packets++;
1902 }
1903 /* Free the original skb. */
1904 skb = sis_priv->tx_skbuff[entry];
1905 pci_unmap_single(sis_priv->pci_dev,
1906 sis_priv->tx_ring[entry].bufptr, skb->len,
1907 PCI_DMA_TODEVICE);
1908 dev_kfree_skb_irq(skb);
1909 sis_priv->tx_skbuff[entry] = NULL;
1910 sis_priv->tx_ring[entry].bufptr = 0;
1911 sis_priv->tx_ring[entry].cmdsts = 0;
1912 }
1913
1914 if (sis_priv->tx_full && netif_queue_stopped(net_dev) &&
1915 sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
1916 /* The ring is no longer full, clear tx_full and schedule
1917 * more transmission by netif_wake_queue(net_dev) */
1918 sis_priv->tx_full = 0;
1919 netif_wake_queue (net_dev);
1920 }
1921}
1922
1923/**
1924 * sis900_close - close sis900 device
1925 * @net_dev: the net device to be closed
1926 *
1927 * Disable interrupts, stop the Tx and Rx Status Machine
1928 * free Tx and RX socket buffer
1929 */
1930
1931static int sis900_close(struct net_device *net_dev)
1932{
1933 long ioaddr = net_dev->base_addr;
1934 struct sis900_private *sis_priv = net_dev->priv;
1935 struct sk_buff *skb;
1936 int i;
1937
1938 netif_stop_queue(net_dev);
1939
1940 /* Disable interrupts by clearing the interrupt mask. */
1941 outl(0x0000, ioaddr + imr);
1942 outl(0x0000, ioaddr + ier);
1943
1944 /* Stop the chip's Tx and Rx Status Machine */
1945 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
1946
1947 del_timer(&sis_priv->timer);
1948
1949 free_irq(net_dev->irq, net_dev);
1950
1951 /* Free Tx and RX skbuff */
1952 for (i = 0; i < NUM_RX_DESC; i++) {
1953 skb = sis_priv->rx_skbuff[i];
1954 if (skb) {
1955 pci_unmap_single(sis_priv->pci_dev,
1956 sis_priv->rx_ring[i].bufptr,
1957 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1958 dev_kfree_skb(skb);
1959 sis_priv->rx_skbuff[i] = NULL;
1960 }
1961 }
1962 for (i = 0; i < NUM_TX_DESC; i++) {
1963 skb = sis_priv->tx_skbuff[i];
1964 if (skb) {
1965 pci_unmap_single(sis_priv->pci_dev,
1966 sis_priv->tx_ring[i].bufptr, skb->len,
1967 PCI_DMA_TODEVICE);
1968 dev_kfree_skb(skb);
1969 sis_priv->tx_skbuff[i] = NULL;
1970 }
1971 }
1972
1973 /* Green! Put the chip in low-power mode. */
1974
1975 return 0;
1976}
1977
1978/**
1979 * sis900_get_drvinfo - Return information about driver
1980 * @net_dev: the net device to probe
1981 * @info: container for info returned
1982 *
1983 * Process ethtool command such as "ehtool -i" to show information
1984 */
1985
1986static void sis900_get_drvinfo(struct net_device *net_dev,
1987 struct ethtool_drvinfo *info)
1988{
1989 struct sis900_private *sis_priv = net_dev->priv;
1990
1991 strcpy (info->driver, SIS900_MODULE_NAME);
1992 strcpy (info->version, SIS900_DRV_VERSION);
1993 strcpy (info->bus_info, pci_name(sis_priv->pci_dev));
1994}
1995
1996static u32 sis900_get_msglevel(struct net_device *net_dev)
1997{
1998 struct sis900_private *sis_priv = net_dev->priv;
1999 return sis_priv->msg_enable;
2000}
2001
2002static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
2003{
2004 struct sis900_private *sis_priv = net_dev->priv;
2005 sis_priv->msg_enable = value;
2006}
2007
Daniele Venzanoda369b02005-05-12 20:13:14 -04002008static u32 sis900_get_link(struct net_device *net_dev)
2009{
2010 struct sis900_private *sis_priv = net_dev->priv;
2011 return mii_link_ok(&sis_priv->mii_info);
2012}
2013
2014static int sis900_get_settings(struct net_device *net_dev,
2015 struct ethtool_cmd *cmd)
2016{
2017 struct sis900_private *sis_priv = net_dev->priv;
2018 spin_lock_irq(&sis_priv->lock);
2019 mii_ethtool_gset(&sis_priv->mii_info, cmd);
2020 spin_unlock_irq(&sis_priv->lock);
2021 return 0;
2022}
2023
2024static int sis900_set_settings(struct net_device *net_dev,
2025 struct ethtool_cmd *cmd)
2026{
2027 struct sis900_private *sis_priv = net_dev->priv;
2028 int rt;
2029 spin_lock_irq(&sis_priv->lock);
2030 rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
2031 spin_unlock_irq(&sis_priv->lock);
2032 return rt;
2033}
2034
2035static int sis900_nway_reset(struct net_device *net_dev)
2036{
2037 struct sis900_private *sis_priv = net_dev->priv;
2038 return mii_nway_restart(&sis_priv->mii_info);
2039}
2040
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002041/**
2042 * sis900_set_wol - Set up Wake on Lan registers
2043 * @net_dev: the net device to probe
2044 * @wol: container for info passed to the driver
2045 *
2046 * Process ethtool command "wol" to setup wake on lan features.
2047 * SiS900 supports sending WoL events if a correct packet is received,
2048 * but there is no simple way to filter them to only a subset (broadcast,
2049 * multicast, unicast or arp).
2050 */
2051
2052static int sis900_set_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2053{
2054 struct sis900_private *sis_priv = net_dev->priv;
2055 long pmctrl_addr = net_dev->base_addr + pmctrl;
2056 u32 cfgpmcsr = 0, pmctrl_bits = 0;
2057
2058 if (wol->wolopts == 0) {
2059 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
Daniele Venzano7bef4b32006-02-25 17:01:09 -05002060 cfgpmcsr &= ~PME_EN;
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002061 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2062 outl(pmctrl_bits, pmctrl_addr);
2063 if (netif_msg_wol(sis_priv))
2064 printk(KERN_DEBUG "%s: Wake on LAN disabled\n", net_dev->name);
2065 return 0;
2066 }
2067
2068 if (wol->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST
2069 | WAKE_BCAST | WAKE_ARP))
2070 return -EINVAL;
2071
2072 if (wol->wolopts & WAKE_MAGIC)
2073 pmctrl_bits |= MAGICPKT;
2074 if (wol->wolopts & WAKE_PHY)
2075 pmctrl_bits |= LINKON;
2076
2077 outl(pmctrl_bits, pmctrl_addr);
2078
2079 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
2080 cfgpmcsr |= PME_EN;
2081 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2082 if (netif_msg_wol(sis_priv))
2083 printk(KERN_DEBUG "%s: Wake on LAN enabled\n", net_dev->name);
2084
2085 return 0;
2086}
2087
2088static void sis900_get_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2089{
2090 long pmctrl_addr = net_dev->base_addr + pmctrl;
2091 u32 pmctrl_bits;
2092
2093 pmctrl_bits = inl(pmctrl_addr);
2094 if (pmctrl_bits & MAGICPKT)
2095 wol->wolopts |= WAKE_MAGIC;
2096 if (pmctrl_bits & LINKON)
2097 wol->wolopts |= WAKE_PHY;
2098
2099 wol->supported = (WAKE_PHY | WAKE_MAGIC);
2100}
2101
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102static struct ethtool_ops sis900_ethtool_ops = {
2103 .get_drvinfo = sis900_get_drvinfo,
2104 .get_msglevel = sis900_get_msglevel,
2105 .set_msglevel = sis900_set_msglevel,
Daniele Venzanoda369b02005-05-12 20:13:14 -04002106 .get_link = sis900_get_link,
2107 .get_settings = sis900_get_settings,
2108 .set_settings = sis900_set_settings,
2109 .nway_reset = sis900_nway_reset,
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002110 .get_wol = sis900_get_wol,
2111 .set_wol = sis900_set_wol
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112};
2113
2114/**
2115 * mii_ioctl - process MII i/o control command
2116 * @net_dev: the net device to command for
2117 * @rq: parameter for command
2118 * @cmd: the i/o command
2119 *
2120 * Process MII command like read/write MII register
2121 */
2122
2123static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
2124{
2125 struct sis900_private *sis_priv = net_dev->priv;
2126 struct mii_ioctl_data *data = if_mii(rq);
2127
2128 switch(cmd) {
2129 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2130 data->phy_id = sis_priv->mii->phy_addr;
2131 /* Fall Through */
2132
2133 case SIOCGMIIREG: /* Read MII PHY register. */
2134 data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
2135 return 0;
2136
2137 case SIOCSMIIREG: /* Write MII PHY register. */
2138 if (!capable(CAP_NET_ADMIN))
2139 return -EPERM;
2140 mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
2141 return 0;
2142 default:
2143 return -EOPNOTSUPP;
2144 }
2145}
2146
2147/**
2148 * sis900_get_stats - Get sis900 read/write statistics
2149 * @net_dev: the net device to get statistics for
2150 *
2151 * get tx/rx statistics for sis900
2152 */
2153
2154static struct net_device_stats *
2155sis900_get_stats(struct net_device *net_dev)
2156{
2157 struct sis900_private *sis_priv = net_dev->priv;
2158
2159 return &sis_priv->stats;
2160}
2161
2162/**
2163 * sis900_set_config - Set media type by net_device.set_config
2164 * @dev: the net device for media type change
2165 * @map: ifmap passed by ifconfig
2166 *
2167 * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
2168 * we support only port changes. All other runtime configuration
2169 * changes will be ignored
2170 */
2171
2172static int sis900_set_config(struct net_device *dev, struct ifmap *map)
2173{
2174 struct sis900_private *sis_priv = dev->priv;
2175 struct mii_phy *mii_phy = sis_priv->mii;
2176
2177 u16 status;
2178
2179 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
2180 /* we switch on the ifmap->port field. I couldn't find anything
2181 * like a definition or standard for the values of that field.
2182 * I think the meaning of those values is device specific. But
2183 * since I would like to change the media type via the ifconfig
2184 * command I use the definition from linux/netdevice.h
2185 * (which seems to be different from the ifport(pcmcia) definition) */
2186 switch(map->port){
2187 case IF_PORT_UNKNOWN: /* use auto here */
2188 dev->if_port = map->port;
2189 /* we are going to change the media type, so the Link
2190 * will be temporary down and we need to reflect that
2191 * here. When the Link comes up again, it will be
2192 * sensed by the sis_timer procedure, which also does
2193 * all the rest for us */
2194 netif_carrier_off(dev);
2195
2196 /* read current state */
2197 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2198
2199 /* enable auto negotiation and reset the negotioation
2200 * (I don't really know what the auto negatiotiation
2201 * reset really means, but it sounds for me right to
2202 * do one here) */
2203 mdio_write(dev, mii_phy->phy_addr,
2204 MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
2205
2206 break;
2207
2208 case IF_PORT_10BASET: /* 10BaseT */
2209 dev->if_port = map->port;
2210
2211 /* we are going to change the media type, so the Link
2212 * will be temporary down and we need to reflect that
2213 * here. When the Link comes up again, it will be
2214 * sensed by the sis_timer procedure, which also does
2215 * all the rest for us */
2216 netif_carrier_off(dev);
2217
2218 /* set Speed to 10Mbps */
2219 /* read current state */
2220 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2221
2222 /* disable auto negotiation and force 10MBit mode*/
2223 mdio_write(dev, mii_phy->phy_addr,
2224 MII_CONTROL, status & ~(MII_CNTL_SPEED |
2225 MII_CNTL_AUTO));
2226 break;
2227
2228 case IF_PORT_100BASET: /* 100BaseT */
2229 case IF_PORT_100BASETX: /* 100BaseTx */
2230 dev->if_port = map->port;
2231
2232 /* we are going to change the media type, so the Link
2233 * will be temporary down and we need to reflect that
2234 * here. When the Link comes up again, it will be
2235 * sensed by the sis_timer procedure, which also does
2236 * all the rest for us */
2237 netif_carrier_off(dev);
2238
2239 /* set Speed to 100Mbps */
2240 /* disable auto negotiation and enable 100MBit Mode */
2241 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2242 mdio_write(dev, mii_phy->phy_addr,
2243 MII_CONTROL, (status & ~MII_CNTL_SPEED) |
2244 MII_CNTL_SPEED);
2245
2246 break;
2247
2248 case IF_PORT_10BASE2: /* 10Base2 */
2249 case IF_PORT_AUI: /* AUI */
2250 case IF_PORT_100BASEFX: /* 100BaseFx */
2251 /* These Modes are not supported (are they?)*/
2252 return -EOPNOTSUPP;
2253 break;
2254
2255 default:
2256 return -EINVAL;
2257 }
2258 }
2259 return 0;
2260}
2261
2262/**
2263 * sis900_mcast_bitnr - compute hashtable index
2264 * @addr: multicast address
2265 * @revision: revision id of chip
2266 *
2267 * SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
2268 * hash table, which makes this function a little bit different from other drivers
2269 * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
2270 * multicast hash table.
2271 */
2272
2273static inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
2274{
2275
2276 u32 crc = ether_crc(6, addr);
2277
2278 /* leave 8 or 7 most siginifant bits */
2279 if ((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
2280 return ((int)(crc >> 24));
2281 else
2282 return ((int)(crc >> 25));
2283}
2284
2285/**
2286 * set_rx_mode - Set SiS900 receive mode
2287 * @net_dev: the net device to be set
2288 *
2289 * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
2290 * And set the appropriate multicast filter.
2291 * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
2292 */
2293
2294static void set_rx_mode(struct net_device *net_dev)
2295{
2296 long ioaddr = net_dev->base_addr;
2297 struct sis900_private * sis_priv = net_dev->priv;
2298 u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
2299 int i, table_entries;
2300 u32 rx_mode;
2301
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08002302 /* 635 Hash Table entries = 256(2^16) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
2304 (sis_priv->chipset_rev == SIS900B_900_REV))
2305 table_entries = 16;
2306 else
2307 table_entries = 8;
2308
2309 if (net_dev->flags & IFF_PROMISC) {
2310 /* Accept any kinds of packets */
2311 rx_mode = RFPromiscuous;
2312 for (i = 0; i < table_entries; i++)
2313 mc_filter[i] = 0xffff;
2314 } else if ((net_dev->mc_count > multicast_filter_limit) ||
2315 (net_dev->flags & IFF_ALLMULTI)) {
2316 /* too many multicast addresses or accept all multicast packet */
2317 rx_mode = RFAAB | RFAAM;
2318 for (i = 0; i < table_entries; i++)
2319 mc_filter[i] = 0xffff;
2320 } else {
2321 /* Accept Broadcast packet, destination address matchs our
2322 * MAC address, use Receive Filter to reject unwanted MCAST
2323 * packets */
2324 struct dev_mc_list *mclist;
2325 rx_mode = RFAAB;
2326 for (i = 0, mclist = net_dev->mc_list;
2327 mclist && i < net_dev->mc_count;
2328 i++, mclist = mclist->next) {
2329 unsigned int bit_nr =
2330 sis900_mcast_bitnr(mclist->dmi_addr, sis_priv->chipset_rev);
2331 mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
2332 }
2333 }
2334
2335 /* update Multicast Hash Table in Receive Filter */
2336 for (i = 0; i < table_entries; i++) {
2337 /* why plus 0x04 ??, That makes the correct value for hash table. */
2338 outl((u32)(0x00000004+i) << RFADDR_shift, ioaddr + rfcr);
2339 outl(mc_filter[i], ioaddr + rfdr);
2340 }
2341
2342 outl(RFEN | rx_mode, ioaddr + rfcr);
2343
2344 /* sis900 is capable of looping back packets at MAC level for
2345 * debugging purpose */
2346 if (net_dev->flags & IFF_LOOPBACK) {
2347 u32 cr_saved;
2348 /* We must disable Tx/Rx before setting loopback mode */
2349 cr_saved = inl(ioaddr + cr);
2350 outl(cr_saved | TxDIS | RxDIS, ioaddr + cr);
2351 /* enable loopback */
2352 outl(inl(ioaddr + txcfg) | TxMLB, ioaddr + txcfg);
2353 outl(inl(ioaddr + rxcfg) | RxATX, ioaddr + rxcfg);
2354 /* restore cr */
2355 outl(cr_saved, ioaddr + cr);
2356 }
2357
2358 return;
2359}
2360
2361/**
2362 * sis900_reset - Reset sis900 MAC
2363 * @net_dev: the net device to reset
2364 *
2365 * reset sis900 MAC and wait until finished
2366 * reset through command register
2367 * change backoff algorithm for 900B0 & 635 M/B
2368 */
2369
2370static void sis900_reset(struct net_device *net_dev)
2371{
2372 struct sis900_private * sis_priv = net_dev->priv;
2373 long ioaddr = net_dev->base_addr;
2374 int i = 0;
2375 u32 status = TxRCMP | RxRCMP;
2376
2377 outl(0, ioaddr + ier);
2378 outl(0, ioaddr + imr);
2379 outl(0, ioaddr + rfcr);
2380
2381 outl(RxRESET | TxRESET | RESET | inl(ioaddr + cr), ioaddr + cr);
2382
2383 /* Check that the chip has finished the reset. */
2384 while (status && (i++ < 1000)) {
2385 status ^= (inl(isr + ioaddr) & status);
2386 }
2387
2388 if( (sis_priv->chipset_rev >= SIS635A_900_REV) ||
2389 (sis_priv->chipset_rev == SIS900B_900_REV) )
2390 outl(PESEL | RND_CNT, ioaddr + cfg);
2391 else
2392 outl(PESEL, ioaddr + cfg);
2393}
2394
2395/**
2396 * sis900_remove - Remove sis900 device
2397 * @pci_dev: the pci device to be removed
2398 *
2399 * remove and release SiS900 net device
2400 */
2401
2402static void __devexit sis900_remove(struct pci_dev *pci_dev)
2403{
2404 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2405 struct sis900_private * sis_priv = net_dev->priv;
2406 struct mii_phy *phy = NULL;
2407
2408 while (sis_priv->first_mii) {
2409 phy = sis_priv->first_mii;
2410 sis_priv->first_mii = phy->next;
2411 kfree(phy);
2412 }
2413
2414 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
2415 sis_priv->rx_ring_dma);
2416 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
2417 sis_priv->tx_ring_dma);
2418 unregister_netdev(net_dev);
2419 free_netdev(net_dev);
2420 pci_release_regions(pci_dev);
2421 pci_set_drvdata(pci_dev, NULL);
2422}
2423
2424#ifdef CONFIG_PM
2425
2426static int sis900_suspend(struct pci_dev *pci_dev, pm_message_t state)
2427{
2428 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2429 long ioaddr = net_dev->base_addr;
2430
2431 if(!netif_running(net_dev))
2432 return 0;
2433
2434 netif_stop_queue(net_dev);
2435 netif_device_detach(net_dev);
2436
2437 /* Stop the chip's Tx and Rx Status Machine */
2438 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
2439
2440 pci_set_power_state(pci_dev, PCI_D3hot);
2441 pci_save_state(pci_dev);
2442
2443 return 0;
2444}
2445
2446static int sis900_resume(struct pci_dev *pci_dev)
2447{
2448 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2449 struct sis900_private *sis_priv = net_dev->priv;
2450 long ioaddr = net_dev->base_addr;
2451
2452 if(!netif_running(net_dev))
2453 return 0;
2454 pci_restore_state(pci_dev);
2455 pci_set_power_state(pci_dev, PCI_D0);
2456
2457 sis900_init_rxfilter(net_dev);
2458
2459 sis900_init_tx_ring(net_dev);
2460 sis900_init_rx_ring(net_dev);
2461
2462 set_rx_mode(net_dev);
2463
2464 netif_device_attach(net_dev);
2465 netif_start_queue(net_dev);
2466
2467 /* Workaround for EDB */
2468 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
2469
2470 /* Enable all known interrupts by setting the interrupt mask. */
2471 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
2472 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
2473 outl(IE, ioaddr + ier);
2474
2475 sis900_check_mode(net_dev, sis_priv->mii);
2476
2477 return 0;
2478}
2479#endif /* CONFIG_PM */
2480
2481static struct pci_driver sis900_pci_driver = {
2482 .name = SIS900_MODULE_NAME,
2483 .id_table = sis900_pci_tbl,
2484 .probe = sis900_probe,
2485 .remove = __devexit_p(sis900_remove),
2486#ifdef CONFIG_PM
2487 .suspend = sis900_suspend,
2488 .resume = sis900_resume,
2489#endif /* CONFIG_PM */
2490};
2491
2492static int __init sis900_init_module(void)
2493{
2494/* when a module, this is printed whether or not devices are found in probe */
2495#ifdef MODULE
2496 printk(version);
2497#endif
2498
Jeff Garzik29917622006-08-19 17:48:59 -04002499 return pci_register_driver(&sis900_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500}
2501
2502static void __exit sis900_cleanup_module(void)
2503{
2504 pci_unregister_driver(&sis900_pci_driver);
2505}
2506
2507module_init(sis900_init_module);
2508module_exit(sis900_cleanup_module);
2509