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Merge remote-tracking branch 'h8300/h8300-next'
[deliverable/linux.git] / drivers / net / ethernet / sis / sis900.c
1 /* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
2 Copyright 1999 Silicon Integrated System Corporation
3 Revision: 1.08.10 Apr. 2 2006
4
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
20 Rev 1.08.10 Apr. 2 2006 Daniele Venzano add vlan (jumbo packets) support
21 Rev 1.08.09 Sep. 19 2005 Daniele Venzano add Wake on LAN support
22 Rev 1.08.08 Jan. 22 2005 Daniele Venzano use netif_msg for debugging messages
23 Rev 1.08.07 Nov. 2 2003 Daniele Venzano <venza@brownhat.org> add suspend/resume support
24 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 equalizer 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/sched.h>
56 #include <linux/string.h>
57 #include <linux/timer.h>
58 #include <linux/errno.h>
59 #include <linux/ioport.h>
60 #include <linux/slab.h>
61 #include <linux/interrupt.h>
62 #include <linux/pci.h>
63 #include <linux/netdevice.h>
64 #include <linux/init.h>
65 #include <linux/mii.h>
66 #include <linux/etherdevice.h>
67 #include <linux/skbuff.h>
68 #include <linux/delay.h>
69 #include <linux/ethtool.h>
70 #include <linux/crc32.h>
71 #include <linux/bitops.h>
72 #include <linux/dma-mapping.h>
73
74 #include <asm/processor.h> /* Processor type for cache alignment. */
75 #include <asm/io.h>
76 #include <asm/irq.h>
77 #include <asm/uaccess.h> /* User space memory access functions */
78
79 #include "sis900.h"
80
81 #define SIS900_MODULE_NAME "sis900"
82 #define SIS900_DRV_VERSION "v1.08.10 Apr. 2 2006"
83
84 static const char version[] =
85 KERN_INFO "sis900.c: " SIS900_DRV_VERSION "\n";
86
87 static int max_interrupt_work = 40;
88 static int multicast_filter_limit = 128;
89
90 static int sis900_debug = -1; /* Use SIS900_DEF_MSG as value */
91
92 #define SIS900_DEF_MSG \
93 (NETIF_MSG_DRV | \
94 NETIF_MSG_LINK | \
95 NETIF_MSG_RX_ERR | \
96 NETIF_MSG_TX_ERR)
97
98 /* Time in jiffies before concluding the transmitter is hung. */
99 #define TX_TIMEOUT (4*HZ)
100
101 enum {
102 SIS_900 = 0,
103 SIS_7016
104 };
105 static const char * card_names[] = {
106 "SiS 900 PCI Fast Ethernet",
107 "SiS 7016 PCI Fast Ethernet"
108 };
109
110 static const struct pci_device_id sis900_pci_tbl[] = {
111 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
112 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_900},
113 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
114 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7016},
115 {0,}
116 };
117 MODULE_DEVICE_TABLE (pci, sis900_pci_tbl);
118
119 static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex);
120
121 static const struct mii_chip_info {
122 const char * name;
123 u16 phy_id0;
124 u16 phy_id1;
125 u8 phy_types;
126 #define HOME 0x0001
127 #define LAN 0x0002
128 #define MIX 0x0003
129 #define UNKNOWN 0x0
130 } mii_chip_table[] = {
131 { "SiS 900 Internal MII PHY", 0x001d, 0x8000, LAN },
132 { "SiS 7014 Physical Layer Solution", 0x0016, 0xf830, LAN },
133 { "SiS 900 on Foxconn 661 7MI", 0x0143, 0xBC70, LAN },
134 { "Altimata AC101LF PHY", 0x0022, 0x5520, LAN },
135 { "ADM 7001 LAN PHY", 0x002e, 0xcc60, LAN },
136 { "AMD 79C901 10BASE-T PHY", 0x0000, 0x6B70, LAN },
137 { "AMD 79C901 HomePNA PHY", 0x0000, 0x6B90, HOME},
138 { "ICS LAN PHY", 0x0015, 0xF440, LAN },
139 { "ICS LAN PHY", 0x0143, 0xBC70, LAN },
140 { "NS 83851 PHY", 0x2000, 0x5C20, MIX },
141 { "NS 83847 PHY", 0x2000, 0x5C30, MIX },
142 { "Realtek RTL8201 PHY", 0x0000, 0x8200, LAN },
143 { "VIA 6103 PHY", 0x0101, 0x8f20, LAN },
144 {NULL,},
145 };
146
147 struct mii_phy {
148 struct mii_phy * next;
149 int phy_addr;
150 u16 phy_id0;
151 u16 phy_id1;
152 u16 status;
153 u8 phy_types;
154 };
155
156 typedef struct _BufferDesc {
157 u32 link;
158 u32 cmdsts;
159 u32 bufptr;
160 } BufferDesc;
161
162 struct sis900_private {
163 struct pci_dev * pci_dev;
164
165 spinlock_t lock;
166
167 struct mii_phy * mii;
168 struct mii_phy * first_mii; /* record the first mii structure */
169 unsigned int cur_phy;
170 struct mii_if_info mii_info;
171
172 void __iomem *ioaddr;
173
174 struct timer_list timer; /* Link status detection timer. */
175 u8 autong_complete; /* 1: auto-negotiate complete */
176
177 u32 msg_enable;
178
179 unsigned int cur_rx, dirty_rx; /* producer/comsumer pointers for Tx/Rx ring */
180 unsigned int cur_tx, dirty_tx;
181
182 /* The saved address of a sent/receive-in-place packet buffer */
183 struct sk_buff *tx_skbuff[NUM_TX_DESC];
184 struct sk_buff *rx_skbuff[NUM_RX_DESC];
185 BufferDesc *tx_ring;
186 BufferDesc *rx_ring;
187
188 dma_addr_t tx_ring_dma;
189 dma_addr_t rx_ring_dma;
190
191 unsigned int tx_full; /* The Tx queue is full. */
192 u8 host_bridge_rev;
193 u8 chipset_rev;
194 };
195
196 MODULE_AUTHOR("Jim Huang <cmhuang@sis.com.tw>, Ollie Lho <ollie@sis.com.tw>");
197 MODULE_DESCRIPTION("SiS 900 PCI Fast Ethernet driver");
198 MODULE_LICENSE("GPL");
199
200 module_param(multicast_filter_limit, int, 0444);
201 module_param(max_interrupt_work, int, 0444);
202 module_param(sis900_debug, int, 0444);
203 MODULE_PARM_DESC(multicast_filter_limit, "SiS 900/7016 maximum number of filtered multicast addresses");
204 MODULE_PARM_DESC(max_interrupt_work, "SiS 900/7016 maximum events handled per interrupt");
205 MODULE_PARM_DESC(sis900_debug, "SiS 900/7016 bitmapped debugging message level");
206
207 #define sw32(reg, val) iowrite32(val, ioaddr + (reg))
208 #define sw8(reg, val) iowrite8(val, ioaddr + (reg))
209 #define sr32(reg) ioread32(ioaddr + (reg))
210 #define sr16(reg) ioread16(ioaddr + (reg))
211
212 #ifdef CONFIG_NET_POLL_CONTROLLER
213 static void sis900_poll(struct net_device *dev);
214 #endif
215 static int sis900_open(struct net_device *net_dev);
216 static int sis900_mii_probe (struct net_device * net_dev);
217 static void sis900_init_rxfilter (struct net_device * net_dev);
218 static u16 read_eeprom(void __iomem *ioaddr, int location);
219 static int mdio_read(struct net_device *net_dev, int phy_id, int location);
220 static void mdio_write(struct net_device *net_dev, int phy_id, int location, int val);
221 static void sis900_timer(unsigned long data);
222 static void sis900_check_mode (struct net_device *net_dev, struct mii_phy *mii_phy);
223 static void sis900_tx_timeout(struct net_device *net_dev);
224 static void sis900_init_tx_ring(struct net_device *net_dev);
225 static void sis900_init_rx_ring(struct net_device *net_dev);
226 static netdev_tx_t sis900_start_xmit(struct sk_buff *skb,
227 struct net_device *net_dev);
228 static int sis900_rx(struct net_device *net_dev);
229 static void sis900_finish_xmit (struct net_device *net_dev);
230 static irqreturn_t sis900_interrupt(int irq, void *dev_instance);
231 static int sis900_close(struct net_device *net_dev);
232 static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd);
233 static u16 sis900_mcast_bitnr(u8 *addr, u8 revision);
234 static void set_rx_mode(struct net_device *net_dev);
235 static void sis900_reset(struct net_device *net_dev);
236 static void sis630_set_eq(struct net_device *net_dev, u8 revision);
237 static int sis900_set_config(struct net_device *dev, struct ifmap *map);
238 static u16 sis900_default_phy(struct net_device * net_dev);
239 static void sis900_set_capability( struct net_device *net_dev ,struct mii_phy *phy);
240 static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr);
241 static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr);
242 static void sis900_set_mode(struct sis900_private *, int speed, int duplex);
243 static const struct ethtool_ops sis900_ethtool_ops;
244
245 /**
246 * sis900_get_mac_addr - Get MAC address for stand alone SiS900 model
247 * @pci_dev: the sis900 pci device
248 * @net_dev: the net device to get address for
249 *
250 * Older SiS900 and friends, use EEPROM to store MAC address.
251 * MAC address is read from read_eeprom() into @net_dev->dev_addr.
252 */
253
254 static int sis900_get_mac_addr(struct pci_dev *pci_dev,
255 struct net_device *net_dev)
256 {
257 struct sis900_private *sis_priv = netdev_priv(net_dev);
258 void __iomem *ioaddr = sis_priv->ioaddr;
259 u16 signature;
260 int i;
261
262 /* check to see if we have sane EEPROM */
263 signature = (u16) read_eeprom(ioaddr, EEPROMSignature);
264 if (signature == 0xffff || signature == 0x0000) {
265 printk (KERN_WARNING "%s: Error EERPOM read %x\n",
266 pci_name(pci_dev), signature);
267 return 0;
268 }
269
270 /* get MAC address from EEPROM */
271 for (i = 0; i < 3; i++)
272 ((u16 *)(net_dev->dev_addr))[i] = read_eeprom(ioaddr, i+EEPROMMACAddr);
273
274 return 1;
275 }
276
277 /**
278 * sis630e_get_mac_addr - Get MAC address for SiS630E model
279 * @pci_dev: the sis900 pci device
280 * @net_dev: the net device to get address for
281 *
282 * SiS630E model, use APC CMOS RAM to store MAC address.
283 * APC CMOS RAM is accessed through ISA bridge.
284 * MAC address is read into @net_dev->dev_addr.
285 */
286
287 static int sis630e_get_mac_addr(struct pci_dev *pci_dev,
288 struct net_device *net_dev)
289 {
290 struct pci_dev *isa_bridge = NULL;
291 u8 reg;
292 int i;
293
294 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0008, isa_bridge);
295 if (!isa_bridge)
296 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0018, isa_bridge);
297 if (!isa_bridge) {
298 printk(KERN_WARNING "%s: Can not find ISA bridge\n",
299 pci_name(pci_dev));
300 return 0;
301 }
302 pci_read_config_byte(isa_bridge, 0x48, &reg);
303 pci_write_config_byte(isa_bridge, 0x48, reg | 0x40);
304
305 for (i = 0; i < 6; i++) {
306 outb(0x09 + i, 0x70);
307 ((u8 *)(net_dev->dev_addr))[i] = inb(0x71);
308 }
309
310 pci_write_config_byte(isa_bridge, 0x48, reg & ~0x40);
311 pci_dev_put(isa_bridge);
312
313 return 1;
314 }
315
316
317 /**
318 * sis635_get_mac_addr - Get MAC address for SIS635 model
319 * @pci_dev: the sis900 pci device
320 * @net_dev: the net device to get address for
321 *
322 * SiS635 model, set MAC Reload Bit to load Mac address from APC
323 * to rfdr. rfdr is accessed through rfcr. MAC address is read into
324 * @net_dev->dev_addr.
325 */
326
327 static int sis635_get_mac_addr(struct pci_dev *pci_dev,
328 struct net_device *net_dev)
329 {
330 struct sis900_private *sis_priv = netdev_priv(net_dev);
331 void __iomem *ioaddr = sis_priv->ioaddr;
332 u32 rfcrSave;
333 u32 i;
334
335 rfcrSave = sr32(rfcr);
336
337 sw32(cr, rfcrSave | RELOAD);
338 sw32(cr, 0);
339
340 /* disable packet filtering before setting filter */
341 sw32(rfcr, rfcrSave & ~RFEN);
342
343 /* load MAC addr to filter data register */
344 for (i = 0 ; i < 3 ; i++) {
345 sw32(rfcr, (i << RFADDR_shift));
346 *( ((u16 *)net_dev->dev_addr) + i) = sr16(rfdr);
347 }
348
349 /* enable packet filtering */
350 sw32(rfcr, rfcrSave | RFEN);
351
352 return 1;
353 }
354
355 /**
356 * sis96x_get_mac_addr - Get MAC address for SiS962 or SiS963 model
357 * @pci_dev: the sis900 pci device
358 * @net_dev: the net device to get address for
359 *
360 * SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
361 * is shared by
362 * LAN and 1394. When access EEPROM, send EEREQ signal to hardware first
363 * and wait for EEGNT. If EEGNT is ON, EEPROM is permitted to be access
364 * by LAN, otherwise is not. After MAC address is read from EEPROM, send
365 * EEDONE signal to refuse EEPROM access by LAN.
366 * The EEPROM map of SiS962 or SiS963 is different to SiS900.
367 * The signature field in SiS962 or SiS963 spec is meaningless.
368 * MAC address is read into @net_dev->dev_addr.
369 */
370
371 static int sis96x_get_mac_addr(struct pci_dev *pci_dev,
372 struct net_device *net_dev)
373 {
374 struct sis900_private *sis_priv = netdev_priv(net_dev);
375 void __iomem *ioaddr = sis_priv->ioaddr;
376 int wait, rc = 0;
377
378 sw32(mear, EEREQ);
379 for (wait = 0; wait < 2000; wait++) {
380 if (sr32(mear) & EEGNT) {
381 u16 *mac = (u16 *)net_dev->dev_addr;
382 int i;
383
384 /* get MAC address from EEPROM */
385 for (i = 0; i < 3; i++)
386 mac[i] = read_eeprom(ioaddr, i + EEPROMMACAddr);
387
388 rc = 1;
389 break;
390 }
391 udelay(1);
392 }
393 sw32(mear, EEDONE);
394 return rc;
395 }
396
397 static const struct net_device_ops sis900_netdev_ops = {
398 .ndo_open = sis900_open,
399 .ndo_stop = sis900_close,
400 .ndo_start_xmit = sis900_start_xmit,
401 .ndo_set_config = sis900_set_config,
402 .ndo_set_rx_mode = set_rx_mode,
403 .ndo_change_mtu = eth_change_mtu,
404 .ndo_validate_addr = eth_validate_addr,
405 .ndo_set_mac_address = eth_mac_addr,
406 .ndo_do_ioctl = mii_ioctl,
407 .ndo_tx_timeout = sis900_tx_timeout,
408 #ifdef CONFIG_NET_POLL_CONTROLLER
409 .ndo_poll_controller = sis900_poll,
410 #endif
411 };
412
413 /**
414 * sis900_probe - Probe for sis900 device
415 * @pci_dev: the sis900 pci device
416 * @pci_id: the pci device ID
417 *
418 * Check and probe sis900 net device for @pci_dev.
419 * Get mac address according to the chip revision,
420 * and assign SiS900-specific entries in the device structure.
421 * ie: sis900_open(), sis900_start_xmit(), sis900_close(), etc.
422 */
423
424 static int sis900_probe(struct pci_dev *pci_dev,
425 const struct pci_device_id *pci_id)
426 {
427 struct sis900_private *sis_priv;
428 struct net_device *net_dev;
429 struct pci_dev *dev;
430 dma_addr_t ring_dma;
431 void *ring_space;
432 void __iomem *ioaddr;
433 int i, ret;
434 const char *card_name = card_names[pci_id->driver_data];
435 const char *dev_name = pci_name(pci_dev);
436
437 /* when built into the kernel, we only print version if device is found */
438 #ifndef MODULE
439 static int printed_version;
440 if (!printed_version++)
441 printk(version);
442 #endif
443
444 /* setup various bits in PCI command register */
445 ret = pci_enable_device(pci_dev);
446 if(ret) return ret;
447
448 i = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32));
449 if(i){
450 printk(KERN_ERR "sis900.c: architecture does not support "
451 "32bit PCI busmaster DMA\n");
452 return i;
453 }
454
455 pci_set_master(pci_dev);
456
457 net_dev = alloc_etherdev(sizeof(struct sis900_private));
458 if (!net_dev)
459 return -ENOMEM;
460 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
461
462 /* We do a request_region() to register /proc/ioports info. */
463 ret = pci_request_regions(pci_dev, "sis900");
464 if (ret)
465 goto err_out;
466
467 /* IO region. */
468 ioaddr = pci_iomap(pci_dev, 0, 0);
469 if (!ioaddr) {
470 ret = -ENOMEM;
471 goto err_out_cleardev;
472 }
473
474 sis_priv = netdev_priv(net_dev);
475 sis_priv->ioaddr = ioaddr;
476 sis_priv->pci_dev = pci_dev;
477 spin_lock_init(&sis_priv->lock);
478
479 pci_set_drvdata(pci_dev, net_dev);
480
481 ring_space = pci_alloc_consistent(pci_dev, TX_TOTAL_SIZE, &ring_dma);
482 if (!ring_space) {
483 ret = -ENOMEM;
484 goto err_out_unmap;
485 }
486 sis_priv->tx_ring = ring_space;
487 sis_priv->tx_ring_dma = ring_dma;
488
489 ring_space = pci_alloc_consistent(pci_dev, RX_TOTAL_SIZE, &ring_dma);
490 if (!ring_space) {
491 ret = -ENOMEM;
492 goto err_unmap_tx;
493 }
494 sis_priv->rx_ring = ring_space;
495 sis_priv->rx_ring_dma = ring_dma;
496
497 /* The SiS900-specific entries in the device structure. */
498 net_dev->netdev_ops = &sis900_netdev_ops;
499 net_dev->watchdog_timeo = TX_TIMEOUT;
500 net_dev->ethtool_ops = &sis900_ethtool_ops;
501
502 if (sis900_debug > 0)
503 sis_priv->msg_enable = sis900_debug;
504 else
505 sis_priv->msg_enable = SIS900_DEF_MSG;
506
507 sis_priv->mii_info.dev = net_dev;
508 sis_priv->mii_info.mdio_read = mdio_read;
509 sis_priv->mii_info.mdio_write = mdio_write;
510 sis_priv->mii_info.phy_id_mask = 0x1f;
511 sis_priv->mii_info.reg_num_mask = 0x1f;
512
513 /* Get Mac address according to the chip revision */
514 sis_priv->chipset_rev = pci_dev->revision;
515 if(netif_msg_probe(sis_priv))
516 printk(KERN_DEBUG "%s: detected revision %2.2x, "
517 "trying to get MAC address...\n",
518 dev_name, sis_priv->chipset_rev);
519
520 ret = 0;
521 if (sis_priv->chipset_rev == SIS630E_900_REV)
522 ret = sis630e_get_mac_addr(pci_dev, net_dev);
523 else if ((sis_priv->chipset_rev > 0x81) && (sis_priv->chipset_rev <= 0x90) )
524 ret = sis635_get_mac_addr(pci_dev, net_dev);
525 else if (sis_priv->chipset_rev == SIS96x_900_REV)
526 ret = sis96x_get_mac_addr(pci_dev, net_dev);
527 else
528 ret = sis900_get_mac_addr(pci_dev, net_dev);
529
530 if (!ret || !is_valid_ether_addr(net_dev->dev_addr)) {
531 eth_hw_addr_random(net_dev);
532 printk(KERN_WARNING "%s: Unreadable or invalid MAC address,"
533 "using random generated one\n", dev_name);
534 }
535
536 /* 630ET : set the mii access mode as software-mode */
537 if (sis_priv->chipset_rev == SIS630ET_900_REV)
538 sw32(cr, ACCESSMODE | sr32(cr));
539
540 /* probe for mii transceiver */
541 if (sis900_mii_probe(net_dev) == 0) {
542 printk(KERN_WARNING "%s: Error probing MII device.\n",
543 dev_name);
544 ret = -ENODEV;
545 goto err_unmap_rx;
546 }
547
548 /* save our host bridge revision */
549 dev = pci_get_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_630, NULL);
550 if (dev) {
551 sis_priv->host_bridge_rev = dev->revision;
552 pci_dev_put(dev);
553 }
554
555 ret = register_netdev(net_dev);
556 if (ret)
557 goto err_unmap_rx;
558
559 /* print some information about our NIC */
560 printk(KERN_INFO "%s: %s at 0x%p, IRQ %d, %pM\n",
561 net_dev->name, card_name, ioaddr, pci_dev->irq,
562 net_dev->dev_addr);
563
564 /* Detect Wake on Lan support */
565 ret = (sr32(CFGPMC) & PMESP) >> 27;
566 if (netif_msg_probe(sis_priv) && (ret & PME_D3C) == 0)
567 printk(KERN_INFO "%s: Wake on LAN only available from suspend to RAM.", net_dev->name);
568
569 return 0;
570
571 err_unmap_rx:
572 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
573 sis_priv->rx_ring_dma);
574 err_unmap_tx:
575 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
576 sis_priv->tx_ring_dma);
577 err_out_unmap:
578 pci_iounmap(pci_dev, ioaddr);
579 err_out_cleardev:
580 pci_release_regions(pci_dev);
581 err_out:
582 free_netdev(net_dev);
583 return ret;
584 }
585
586 /**
587 * sis900_mii_probe - Probe MII PHY for sis900
588 * @net_dev: the net device to probe for
589 *
590 * Search for total of 32 possible mii phy addresses.
591 * Identify and set current phy if found one,
592 * return error if it failed to found.
593 */
594
595 static int sis900_mii_probe(struct net_device *net_dev)
596 {
597 struct sis900_private *sis_priv = netdev_priv(net_dev);
598 const char *dev_name = pci_name(sis_priv->pci_dev);
599 u16 poll_bit = MII_STAT_LINK, status = 0;
600 unsigned long timeout = jiffies + 5 * HZ;
601 int phy_addr;
602
603 sis_priv->mii = NULL;
604
605 /* search for total of 32 possible mii phy addresses */
606 for (phy_addr = 0; phy_addr < 32; phy_addr++) {
607 struct mii_phy * mii_phy = NULL;
608 u16 mii_status;
609 int i;
610
611 mii_phy = NULL;
612 for(i = 0; i < 2; i++)
613 mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
614
615 if (mii_status == 0xffff || mii_status == 0x0000) {
616 if (netif_msg_probe(sis_priv))
617 printk(KERN_DEBUG "%s: MII at address %d"
618 " not accessible\n",
619 dev_name, phy_addr);
620 continue;
621 }
622
623 if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
624 mii_phy = sis_priv->first_mii;
625 while (mii_phy) {
626 struct mii_phy *phy;
627 phy = mii_phy;
628 mii_phy = mii_phy->next;
629 kfree(phy);
630 }
631 return 0;
632 }
633
634 mii_phy->phy_id0 = mdio_read(net_dev, phy_addr, MII_PHY_ID0);
635 mii_phy->phy_id1 = mdio_read(net_dev, phy_addr, MII_PHY_ID1);
636 mii_phy->phy_addr = phy_addr;
637 mii_phy->status = mii_status;
638 mii_phy->next = sis_priv->mii;
639 sis_priv->mii = mii_phy;
640 sis_priv->first_mii = mii_phy;
641
642 for (i = 0; mii_chip_table[i].phy_id1; i++)
643 if ((mii_phy->phy_id0 == mii_chip_table[i].phy_id0 ) &&
644 ((mii_phy->phy_id1 & 0xFFF0) == mii_chip_table[i].phy_id1)){
645 mii_phy->phy_types = mii_chip_table[i].phy_types;
646 if (mii_chip_table[i].phy_types == MIX)
647 mii_phy->phy_types =
648 (mii_status & (MII_STAT_CAN_TX_FDX | MII_STAT_CAN_TX)) ? LAN : HOME;
649 printk(KERN_INFO "%s: %s transceiver found "
650 "at address %d.\n",
651 dev_name,
652 mii_chip_table[i].name,
653 phy_addr);
654 break;
655 }
656
657 if( !mii_chip_table[i].phy_id1 ) {
658 printk(KERN_INFO "%s: Unknown PHY transceiver found at address %d.\n",
659 dev_name, phy_addr);
660 mii_phy->phy_types = UNKNOWN;
661 }
662 }
663
664 if (sis_priv->mii == NULL) {
665 printk(KERN_INFO "%s: No MII transceivers found!\n", dev_name);
666 return 0;
667 }
668
669 /* select default PHY for mac */
670 sis_priv->mii = NULL;
671 sis900_default_phy( net_dev );
672
673 /* Reset phy if default phy is internal sis900 */
674 if ((sis_priv->mii->phy_id0 == 0x001D) &&
675 ((sis_priv->mii->phy_id1&0xFFF0) == 0x8000))
676 status = sis900_reset_phy(net_dev, sis_priv->cur_phy);
677
678 /* workaround for ICS1893 PHY */
679 if ((sis_priv->mii->phy_id0 == 0x0015) &&
680 ((sis_priv->mii->phy_id1&0xFFF0) == 0xF440))
681 mdio_write(net_dev, sis_priv->cur_phy, 0x0018, 0xD200);
682
683 if(status & MII_STAT_LINK){
684 while (poll_bit) {
685 yield();
686
687 poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
688 if (time_after_eq(jiffies, timeout)) {
689 printk(KERN_WARNING "%s: reset phy and link down now\n",
690 dev_name);
691 return -ETIME;
692 }
693 }
694 }
695
696 if (sis_priv->chipset_rev == SIS630E_900_REV) {
697 /* SiS 630E has some bugs on default value of PHY registers */
698 mdio_write(net_dev, sis_priv->cur_phy, MII_ANADV, 0x05e1);
699 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG1, 0x22);
700 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG2, 0xff00);
701 mdio_write(net_dev, sis_priv->cur_phy, MII_MASK, 0xffc0);
702 //mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, 0x1000);
703 }
704
705 if (sis_priv->mii->status & MII_STAT_LINK)
706 netif_carrier_on(net_dev);
707 else
708 netif_carrier_off(net_dev);
709
710 return 1;
711 }
712
713 /**
714 * sis900_default_phy - Select default PHY for sis900 mac.
715 * @net_dev: the net device to probe for
716 *
717 * Select first detected PHY with link as default.
718 * If no one is link on, select PHY whose types is HOME as default.
719 * If HOME doesn't exist, select LAN.
720 */
721
722 static u16 sis900_default_phy(struct net_device * net_dev)
723 {
724 struct sis900_private *sis_priv = netdev_priv(net_dev);
725 struct mii_phy *phy = NULL, *phy_home = NULL,
726 *default_phy = NULL, *phy_lan = NULL;
727 u16 status;
728
729 for (phy=sis_priv->first_mii; phy; phy=phy->next) {
730 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
731 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
732
733 /* Link ON & Not select default PHY & not ghost PHY */
734 if ((status & MII_STAT_LINK) && !default_phy &&
735 (phy->phy_types != UNKNOWN))
736 default_phy = phy;
737 else {
738 status = mdio_read(net_dev, phy->phy_addr, MII_CONTROL);
739 mdio_write(net_dev, phy->phy_addr, MII_CONTROL,
740 status | MII_CNTL_AUTO | MII_CNTL_ISOLATE);
741 if (phy->phy_types == HOME)
742 phy_home = phy;
743 else if(phy->phy_types == LAN)
744 phy_lan = phy;
745 }
746 }
747
748 if (!default_phy && phy_home)
749 default_phy = phy_home;
750 else if (!default_phy && phy_lan)
751 default_phy = phy_lan;
752 else if (!default_phy)
753 default_phy = sis_priv->first_mii;
754
755 if (sis_priv->mii != default_phy) {
756 sis_priv->mii = default_phy;
757 sis_priv->cur_phy = default_phy->phy_addr;
758 printk(KERN_INFO "%s: Using transceiver found at address %d as default\n",
759 pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
760 }
761
762 sis_priv->mii_info.phy_id = sis_priv->cur_phy;
763
764 status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
765 status &= (~MII_CNTL_ISOLATE);
766
767 mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, status);
768 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
769 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
770
771 return status;
772 }
773
774
775 /**
776 * sis900_set_capability - set the media capability of network adapter.
777 * @net_dev : the net device to probe for
778 * @phy : default PHY
779 *
780 * Set the media capability of network adapter according to
781 * mii status register. It's necessary before auto-negotiate.
782 */
783
784 static void sis900_set_capability(struct net_device *net_dev, struct mii_phy *phy)
785 {
786 u16 cap;
787 u16 status;
788
789 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
790 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
791
792 cap = MII_NWAY_CSMA_CD |
793 ((phy->status & MII_STAT_CAN_TX_FDX)? MII_NWAY_TX_FDX:0) |
794 ((phy->status & MII_STAT_CAN_TX) ? MII_NWAY_TX:0) |
795 ((phy->status & MII_STAT_CAN_T_FDX) ? MII_NWAY_T_FDX:0)|
796 ((phy->status & MII_STAT_CAN_T) ? MII_NWAY_T:0);
797
798 mdio_write(net_dev, phy->phy_addr, MII_ANADV, cap);
799 }
800
801
802 /* Delay between EEPROM clock transitions. */
803 #define eeprom_delay() sr32(mear)
804
805 /**
806 * read_eeprom - Read Serial EEPROM
807 * @ioaddr: base i/o address
808 * @location: the EEPROM location to read
809 *
810 * Read Serial EEPROM through EEPROM Access Register.
811 * Note that location is in word (16 bits) unit
812 */
813
814 static u16 read_eeprom(void __iomem *ioaddr, int location)
815 {
816 u32 read_cmd = location | EEread;
817 int i;
818 u16 retval = 0;
819
820 sw32(mear, 0);
821 eeprom_delay();
822 sw32(mear, EECS);
823 eeprom_delay();
824
825 /* Shift the read command (9) bits out. */
826 for (i = 8; i >= 0; i--) {
827 u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
828
829 sw32(mear, dataval);
830 eeprom_delay();
831 sw32(mear, dataval | EECLK);
832 eeprom_delay();
833 }
834 sw32(mear, EECS);
835 eeprom_delay();
836
837 /* read the 16-bits data in */
838 for (i = 16; i > 0; i--) {
839 sw32(mear, EECS);
840 eeprom_delay();
841 sw32(mear, EECS | EECLK);
842 eeprom_delay();
843 retval = (retval << 1) | ((sr32(mear) & EEDO) ? 1 : 0);
844 eeprom_delay();
845 }
846
847 /* Terminate the EEPROM access. */
848 sw32(mear, 0);
849 eeprom_delay();
850
851 return retval;
852 }
853
854 /* Read and write the MII management registers using software-generated
855 serial MDIO protocol. Note that the command bits and data bits are
856 send out separately */
857 #define mdio_delay() sr32(mear)
858
859 static void mdio_idle(struct sis900_private *sp)
860 {
861 void __iomem *ioaddr = sp->ioaddr;
862
863 sw32(mear, MDIO | MDDIR);
864 mdio_delay();
865 sw32(mear, MDIO | MDDIR | MDC);
866 }
867
868 /* Synchronize the MII management interface by shifting 32 one bits out. */
869 static void mdio_reset(struct sis900_private *sp)
870 {
871 void __iomem *ioaddr = sp->ioaddr;
872 int i;
873
874 for (i = 31; i >= 0; i--) {
875 sw32(mear, MDDIR | MDIO);
876 mdio_delay();
877 sw32(mear, MDDIR | MDIO | MDC);
878 mdio_delay();
879 }
880 }
881
882 /**
883 * mdio_read - read MII PHY register
884 * @net_dev: the net device to read
885 * @phy_id: the phy address to read
886 * @location: the phy regiester id to read
887 *
888 * Read MII registers through MDIO and MDC
889 * using MDIO management frame structure and protocol(defined by ISO/IEC).
890 * Please see SiS7014 or ICS spec
891 */
892
893 static int mdio_read(struct net_device *net_dev, int phy_id, int location)
894 {
895 int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
896 struct sis900_private *sp = netdev_priv(net_dev);
897 void __iomem *ioaddr = sp->ioaddr;
898 u16 retval = 0;
899 int i;
900
901 mdio_reset(sp);
902 mdio_idle(sp);
903
904 for (i = 15; i >= 0; i--) {
905 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
906
907 sw32(mear, dataval);
908 mdio_delay();
909 sw32(mear, dataval | MDC);
910 mdio_delay();
911 }
912
913 /* Read the 16 data bits. */
914 for (i = 16; i > 0; i--) {
915 sw32(mear, 0);
916 mdio_delay();
917 retval = (retval << 1) | ((sr32(mear) & MDIO) ? 1 : 0);
918 sw32(mear, MDC);
919 mdio_delay();
920 }
921 sw32(mear, 0x00);
922
923 return retval;
924 }
925
926 /**
927 * mdio_write - write MII PHY register
928 * @net_dev: the net device to write
929 * @phy_id: the phy address to write
930 * @location: the phy regiester id to write
931 * @value: the register value to write with
932 *
933 * Write MII registers with @value through MDIO and MDC
934 * using MDIO management frame structure and protocol(defined by ISO/IEC)
935 * please see SiS7014 or ICS spec
936 */
937
938 static void mdio_write(struct net_device *net_dev, int phy_id, int location,
939 int value)
940 {
941 int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
942 struct sis900_private *sp = netdev_priv(net_dev);
943 void __iomem *ioaddr = sp->ioaddr;
944 int i;
945
946 mdio_reset(sp);
947 mdio_idle(sp);
948
949 /* Shift the command bits out. */
950 for (i = 15; i >= 0; i--) {
951 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
952
953 sw8(mear, dataval);
954 mdio_delay();
955 sw8(mear, dataval | MDC);
956 mdio_delay();
957 }
958 mdio_delay();
959
960 /* Shift the value bits out. */
961 for (i = 15; i >= 0; i--) {
962 int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
963
964 sw32(mear, dataval);
965 mdio_delay();
966 sw32(mear, dataval | MDC);
967 mdio_delay();
968 }
969 mdio_delay();
970
971 /* Clear out extra bits. */
972 for (i = 2; i > 0; i--) {
973 sw8(mear, 0);
974 mdio_delay();
975 sw8(mear, MDC);
976 mdio_delay();
977 }
978 sw32(mear, 0x00);
979 }
980
981
982 /**
983 * sis900_reset_phy - reset sis900 mii phy.
984 * @net_dev: the net device to write
985 * @phy_addr: default phy address
986 *
987 * Some specific phy can't work properly without reset.
988 * This function will be called during initialization and
989 * link status change from ON to DOWN.
990 */
991
992 static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
993 {
994 int i;
995 u16 status;
996
997 for (i = 0; i < 2; i++)
998 status = mdio_read(net_dev, phy_addr, MII_STATUS);
999
1000 mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
1001
1002 return status;
1003 }
1004
1005 #ifdef CONFIG_NET_POLL_CONTROLLER
1006 /*
1007 * Polling 'interrupt' - used by things like netconsole to send skbs
1008 * without having to re-enable interrupts. It's not called while
1009 * the interrupt routine is executing.
1010 */
1011 static void sis900_poll(struct net_device *dev)
1012 {
1013 struct sis900_private *sp = netdev_priv(dev);
1014 const int irq = sp->pci_dev->irq;
1015
1016 disable_irq(irq);
1017 sis900_interrupt(irq, dev);
1018 enable_irq(irq);
1019 }
1020 #endif
1021
1022 /**
1023 * sis900_open - open sis900 device
1024 * @net_dev: the net device to open
1025 *
1026 * Do some initialization and start net interface.
1027 * enable interrupts and set sis900 timer.
1028 */
1029
1030 static int
1031 sis900_open(struct net_device *net_dev)
1032 {
1033 struct sis900_private *sis_priv = netdev_priv(net_dev);
1034 void __iomem *ioaddr = sis_priv->ioaddr;
1035 int ret;
1036
1037 /* Soft reset the chip. */
1038 sis900_reset(net_dev);
1039
1040 /* Equalizer workaround Rule */
1041 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1042
1043 ret = request_irq(sis_priv->pci_dev->irq, sis900_interrupt, IRQF_SHARED,
1044 net_dev->name, net_dev);
1045 if (ret)
1046 return ret;
1047
1048 sis900_init_rxfilter(net_dev);
1049
1050 sis900_init_tx_ring(net_dev);
1051 sis900_init_rx_ring(net_dev);
1052
1053 set_rx_mode(net_dev);
1054
1055 netif_start_queue(net_dev);
1056
1057 /* Workaround for EDB */
1058 sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
1059
1060 /* Enable all known interrupts by setting the interrupt mask. */
1061 sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE);
1062 sw32(cr, RxENA | sr32(cr));
1063 sw32(ier, IE);
1064
1065 sis900_check_mode(net_dev, sis_priv->mii);
1066
1067 /* Set the timer to switch to check for link beat and perhaps switch
1068 to an alternate media type. */
1069 init_timer(&sis_priv->timer);
1070 sis_priv->timer.expires = jiffies + HZ;
1071 sis_priv->timer.data = (unsigned long)net_dev;
1072 sis_priv->timer.function = sis900_timer;
1073 add_timer(&sis_priv->timer);
1074
1075 return 0;
1076 }
1077
1078 /**
1079 * sis900_init_rxfilter - Initialize the Rx filter
1080 * @net_dev: the net device to initialize for
1081 *
1082 * Set receive filter address to our MAC address
1083 * and enable packet filtering.
1084 */
1085
1086 static void
1087 sis900_init_rxfilter (struct net_device * net_dev)
1088 {
1089 struct sis900_private *sis_priv = netdev_priv(net_dev);
1090 void __iomem *ioaddr = sis_priv->ioaddr;
1091 u32 rfcrSave;
1092 u32 i;
1093
1094 rfcrSave = sr32(rfcr);
1095
1096 /* disable packet filtering before setting filter */
1097 sw32(rfcr, rfcrSave & ~RFEN);
1098
1099 /* load MAC addr to filter data register */
1100 for (i = 0 ; i < 3 ; i++) {
1101 u32 w = (u32) *((u16 *)(net_dev->dev_addr)+i);
1102
1103 sw32(rfcr, i << RFADDR_shift);
1104 sw32(rfdr, w);
1105
1106 if (netif_msg_hw(sis_priv)) {
1107 printk(KERN_DEBUG "%s: Receive Filter Addrss[%d]=%x\n",
1108 net_dev->name, i, sr32(rfdr));
1109 }
1110 }
1111
1112 /* enable packet filtering */
1113 sw32(rfcr, rfcrSave | RFEN);
1114 }
1115
1116 /**
1117 * sis900_init_tx_ring - Initialize the Tx descriptor ring
1118 * @net_dev: the net device to initialize for
1119 *
1120 * Initialize the Tx descriptor ring,
1121 */
1122
1123 static void
1124 sis900_init_tx_ring(struct net_device *net_dev)
1125 {
1126 struct sis900_private *sis_priv = netdev_priv(net_dev);
1127 void __iomem *ioaddr = sis_priv->ioaddr;
1128 int i;
1129
1130 sis_priv->tx_full = 0;
1131 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1132
1133 for (i = 0; i < NUM_TX_DESC; i++) {
1134 sis_priv->tx_skbuff[i] = NULL;
1135
1136 sis_priv->tx_ring[i].link = sis_priv->tx_ring_dma +
1137 ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
1138 sis_priv->tx_ring[i].cmdsts = 0;
1139 sis_priv->tx_ring[i].bufptr = 0;
1140 }
1141
1142 /* load Transmit Descriptor Register */
1143 sw32(txdp, sis_priv->tx_ring_dma);
1144 if (netif_msg_hw(sis_priv))
1145 printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
1146 net_dev->name, sr32(txdp));
1147 }
1148
1149 /**
1150 * sis900_init_rx_ring - Initialize the Rx descriptor ring
1151 * @net_dev: the net device to initialize for
1152 *
1153 * Initialize the Rx descriptor ring,
1154 * and pre-allocate recevie buffers (socket buffer)
1155 */
1156
1157 static void
1158 sis900_init_rx_ring(struct net_device *net_dev)
1159 {
1160 struct sis900_private *sis_priv = netdev_priv(net_dev);
1161 void __iomem *ioaddr = sis_priv->ioaddr;
1162 int i;
1163
1164 sis_priv->cur_rx = 0;
1165 sis_priv->dirty_rx = 0;
1166
1167 /* init RX descriptor */
1168 for (i = 0; i < NUM_RX_DESC; i++) {
1169 sis_priv->rx_skbuff[i] = NULL;
1170
1171 sis_priv->rx_ring[i].link = sis_priv->rx_ring_dma +
1172 ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
1173 sis_priv->rx_ring[i].cmdsts = 0;
1174 sis_priv->rx_ring[i].bufptr = 0;
1175 }
1176
1177 /* allocate sock buffers */
1178 for (i = 0; i < NUM_RX_DESC; i++) {
1179 struct sk_buff *skb;
1180
1181 if ((skb = netdev_alloc_skb(net_dev, RX_BUF_SIZE)) == NULL) {
1182 /* not enough memory for skbuff, this makes a "hole"
1183 on the buffer ring, it is not clear how the
1184 hardware will react to this kind of degenerated
1185 buffer */
1186 break;
1187 }
1188 sis_priv->rx_skbuff[i] = skb;
1189 sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
1190 sis_priv->rx_ring[i].bufptr = pci_map_single(sis_priv->pci_dev,
1191 skb->data, RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1192 if (unlikely(pci_dma_mapping_error(sis_priv->pci_dev,
1193 sis_priv->rx_ring[i].bufptr))) {
1194 dev_kfree_skb(skb);
1195 sis_priv->rx_skbuff[i] = NULL;
1196 break;
1197 }
1198 }
1199 sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
1200
1201 /* load Receive Descriptor Register */
1202 sw32(rxdp, sis_priv->rx_ring_dma);
1203 if (netif_msg_hw(sis_priv))
1204 printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
1205 net_dev->name, sr32(rxdp));
1206 }
1207
1208 /**
1209 * sis630_set_eq - set phy equalizer value for 630 LAN
1210 * @net_dev: the net device to set equalizer value
1211 * @revision: 630 LAN revision number
1212 *
1213 * 630E equalizer workaround rule(Cyrus Huang 08/15)
1214 * PHY register 14h(Test)
1215 * Bit 14: 0 -- Automatically detect (default)
1216 * 1 -- Manually set Equalizer filter
1217 * Bit 13: 0 -- (Default)
1218 * 1 -- Speed up convergence of equalizer setting
1219 * Bit 9 : 0 -- (Default)
1220 * 1 -- Disable Baseline Wander
1221 * Bit 3~7 -- Equalizer filter setting
1222 * Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
1223 * Then calculate equalizer value
1224 * Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
1225 * Link Off:Set Bit 13 to 1, Bit 14 to 0
1226 * Calculate Equalizer value:
1227 * When Link is ON and Bit 14 is 0, SIS900PHY will auto-detect proper equalizer value.
1228 * When the equalizer is stable, this value is not a fixed value. It will be within
1229 * a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
1230 * 0 <= max <= 4 --> set equalizer to max
1231 * 5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
1232 * max >= 15 --> set equalizer to max+5 or set equalizer to max+6 if max == min
1233 */
1234
1235 static void sis630_set_eq(struct net_device *net_dev, u8 revision)
1236 {
1237 struct sis900_private *sis_priv = netdev_priv(net_dev);
1238 u16 reg14h, eq_value=0, max_value=0, min_value=0;
1239 int i, maxcount=10;
1240
1241 if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1242 revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
1243 return;
1244
1245 if (netif_carrier_ok(net_dev)) {
1246 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1247 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1248 (0x2200 | reg14h) & 0xBFFF);
1249 for (i=0; i < maxcount; i++) {
1250 eq_value = (0x00F8 & mdio_read(net_dev,
1251 sis_priv->cur_phy, MII_RESV)) >> 3;
1252 if (i == 0)
1253 max_value=min_value=eq_value;
1254 max_value = (eq_value > max_value) ?
1255 eq_value : max_value;
1256 min_value = (eq_value < min_value) ?
1257 eq_value : min_value;
1258 }
1259 /* 630E rule to determine the equalizer value */
1260 if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1261 revision == SIS630ET_900_REV) {
1262 if (max_value < 5)
1263 eq_value = max_value;
1264 else if (max_value >= 5 && max_value < 15)
1265 eq_value = (max_value == min_value) ?
1266 max_value+2 : max_value+1;
1267 else if (max_value >= 15)
1268 eq_value=(max_value == min_value) ?
1269 max_value+6 : max_value+5;
1270 }
1271 /* 630B0&B1 rule to determine the equalizer value */
1272 if (revision == SIS630A_900_REV &&
1273 (sis_priv->host_bridge_rev == SIS630B0 ||
1274 sis_priv->host_bridge_rev == SIS630B1)) {
1275 if (max_value == 0)
1276 eq_value = 3;
1277 else
1278 eq_value = (max_value + min_value + 1)/2;
1279 }
1280 /* write equalizer value and setting */
1281 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1282 reg14h = (reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
1283 reg14h = (reg14h | 0x6000) & 0xFDFF;
1284 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
1285 } else {
1286 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1287 if (revision == SIS630A_900_REV &&
1288 (sis_priv->host_bridge_rev == SIS630B0 ||
1289 sis_priv->host_bridge_rev == SIS630B1))
1290 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1291 (reg14h | 0x2200) & 0xBFFF);
1292 else
1293 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1294 (reg14h | 0x2000) & 0xBFFF);
1295 }
1296 }
1297
1298 /**
1299 * sis900_timer - sis900 timer routine
1300 * @data: pointer to sis900 net device
1301 *
1302 * On each timer ticks we check two things,
1303 * link status (ON/OFF) and link mode (10/100/Full/Half)
1304 */
1305
1306 static void sis900_timer(unsigned long data)
1307 {
1308 struct net_device *net_dev = (struct net_device *)data;
1309 struct sis900_private *sis_priv = netdev_priv(net_dev);
1310 struct mii_phy *mii_phy = sis_priv->mii;
1311 static const int next_tick = 5*HZ;
1312 int speed = 0, duplex = 0;
1313 u16 status;
1314
1315 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1316 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1317
1318 /* Link OFF -> ON */
1319 if (!netif_carrier_ok(net_dev)) {
1320 LookForLink:
1321 /* Search for new PHY */
1322 status = sis900_default_phy(net_dev);
1323 mii_phy = sis_priv->mii;
1324
1325 if (status & MII_STAT_LINK) {
1326 WARN_ON(!(status & MII_STAT_AUTO_DONE));
1327
1328 sis900_read_mode(net_dev, &speed, &duplex);
1329 if (duplex) {
1330 sis900_set_mode(sis_priv, speed, duplex);
1331 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1332 netif_carrier_on(net_dev);
1333 }
1334 }
1335 } else {
1336 /* Link ON -> OFF */
1337 if (!(status & MII_STAT_LINK)){
1338 netif_carrier_off(net_dev);
1339 if(netif_msg_link(sis_priv))
1340 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1341
1342 /* Change mode issue */
1343 if ((mii_phy->phy_id0 == 0x001D) &&
1344 ((mii_phy->phy_id1 & 0xFFF0) == 0x8000))
1345 sis900_reset_phy(net_dev, sis_priv->cur_phy);
1346
1347 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1348
1349 goto LookForLink;
1350 }
1351 }
1352
1353 sis_priv->timer.expires = jiffies + next_tick;
1354 add_timer(&sis_priv->timer);
1355 }
1356
1357 /**
1358 * sis900_check_mode - check the media mode for sis900
1359 * @net_dev: the net device to be checked
1360 * @mii_phy: the mii phy
1361 *
1362 * Older driver gets the media mode from mii status output
1363 * register. Now we set our media capability and auto-negotiate
1364 * to get the upper bound of speed and duplex between two ends.
1365 * If the types of mii phy is HOME, it doesn't need to auto-negotiate
1366 * and autong_complete should be set to 1.
1367 */
1368
1369 static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
1370 {
1371 struct sis900_private *sis_priv = netdev_priv(net_dev);
1372 void __iomem *ioaddr = sis_priv->ioaddr;
1373 int speed, duplex;
1374
1375 if (mii_phy->phy_types == LAN) {
1376 sw32(cfg, ~EXD & sr32(cfg));
1377 sis900_set_capability(net_dev , mii_phy);
1378 sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
1379 } else {
1380 sw32(cfg, EXD | sr32(cfg));
1381 speed = HW_SPEED_HOME;
1382 duplex = FDX_CAPABLE_HALF_SELECTED;
1383 sis900_set_mode(sis_priv, speed, duplex);
1384 sis_priv->autong_complete = 1;
1385 }
1386 }
1387
1388 /**
1389 * sis900_set_mode - Set the media mode of mac register.
1390 * @sp: the device private data
1391 * @speed : the transmit speed to be determined
1392 * @duplex: the duplex mode to be determined
1393 *
1394 * Set the media mode of mac register txcfg/rxcfg according to
1395 * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
1396 * bus is used instead of PCI bus. When this bit is set 1, the
1397 * Max DMA Burst Size for TX/RX DMA should be no larger than 16
1398 * double words.
1399 */
1400
1401 static void sis900_set_mode(struct sis900_private *sp, int speed, int duplex)
1402 {
1403 void __iomem *ioaddr = sp->ioaddr;
1404 u32 tx_flags = 0, rx_flags = 0;
1405
1406 if (sr32( cfg) & EDB_MASTER_EN) {
1407 tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) |
1408 (TX_FILL_THRESH << TxFILLT_shift);
1409 rx_flags = DMA_BURST_64 << RxMXDMA_shift;
1410 } else {
1411 tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) |
1412 (TX_FILL_THRESH << TxFILLT_shift);
1413 rx_flags = DMA_BURST_512 << RxMXDMA_shift;
1414 }
1415
1416 if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS) {
1417 rx_flags |= (RxDRNT_10 << RxDRNT_shift);
1418 tx_flags |= (TxDRNT_10 << TxDRNT_shift);
1419 } else {
1420 rx_flags |= (RxDRNT_100 << RxDRNT_shift);
1421 tx_flags |= (TxDRNT_100 << TxDRNT_shift);
1422 }
1423
1424 if (duplex == FDX_CAPABLE_FULL_SELECTED) {
1425 tx_flags |= (TxCSI | TxHBI);
1426 rx_flags |= RxATX;
1427 }
1428
1429 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1430 /* Can accept Jumbo packet */
1431 rx_flags |= RxAJAB;
1432 #endif
1433
1434 sw32(txcfg, tx_flags);
1435 sw32(rxcfg, rx_flags);
1436 }
1437
1438 /**
1439 * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
1440 * @net_dev: the net device to read mode for
1441 * @phy_addr: mii phy address
1442 *
1443 * If the adapter is link-on, set the auto-negotiate enable/reset bit.
1444 * autong_complete should be set to 0 when starting auto-negotiation.
1445 * autong_complete should be set to 1 if we didn't start auto-negotiation.
1446 * sis900_timer will wait for link on again if autong_complete = 0.
1447 */
1448
1449 static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
1450 {
1451 struct sis900_private *sis_priv = netdev_priv(net_dev);
1452 int i = 0;
1453 u32 status;
1454
1455 for (i = 0; i < 2; i++)
1456 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1457
1458 if (!(status & MII_STAT_LINK)){
1459 if(netif_msg_link(sis_priv))
1460 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1461 sis_priv->autong_complete = 1;
1462 netif_carrier_off(net_dev);
1463 return;
1464 }
1465
1466 /* (Re)start AutoNegotiate */
1467 mdio_write(net_dev, phy_addr, MII_CONTROL,
1468 MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
1469 sis_priv->autong_complete = 0;
1470 }
1471
1472
1473 /**
1474 * sis900_read_mode - read media mode for sis900 internal phy
1475 * @net_dev: the net device to read mode for
1476 * @speed : the transmit speed to be determined
1477 * @duplex : the duplex mode to be determined
1478 *
1479 * The capability of remote end will be put in mii register autorec
1480 * after auto-negotiation. Use AND operation to get the upper bound
1481 * of speed and duplex between two ends.
1482 */
1483
1484 static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
1485 {
1486 struct sis900_private *sis_priv = netdev_priv(net_dev);
1487 struct mii_phy *phy = sis_priv->mii;
1488 int phy_addr = sis_priv->cur_phy;
1489 u32 status;
1490 u16 autoadv, autorec;
1491 int i;
1492
1493 for (i = 0; i < 2; i++)
1494 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1495
1496 if (!(status & MII_STAT_LINK))
1497 return;
1498
1499 /* AutoNegotiate completed */
1500 autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
1501 autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
1502 status = autoadv & autorec;
1503
1504 *speed = HW_SPEED_10_MBPS;
1505 *duplex = FDX_CAPABLE_HALF_SELECTED;
1506
1507 if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
1508 *speed = HW_SPEED_100_MBPS;
1509 if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
1510 *duplex = FDX_CAPABLE_FULL_SELECTED;
1511
1512 sis_priv->autong_complete = 1;
1513
1514 /* Workaround for Realtek RTL8201 PHY issue */
1515 if ((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)) {
1516 if (mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
1517 *duplex = FDX_CAPABLE_FULL_SELECTED;
1518 if (mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
1519 *speed = HW_SPEED_100_MBPS;
1520 }
1521
1522 if(netif_msg_link(sis_priv))
1523 printk(KERN_INFO "%s: Media Link On %s %s-duplex\n",
1524 net_dev->name,
1525 *speed == HW_SPEED_100_MBPS ?
1526 "100mbps" : "10mbps",
1527 *duplex == FDX_CAPABLE_FULL_SELECTED ?
1528 "full" : "half");
1529 }
1530
1531 /**
1532 * sis900_tx_timeout - sis900 transmit timeout routine
1533 * @net_dev: the net device to transmit
1534 *
1535 * print transmit timeout status
1536 * disable interrupts and do some tasks
1537 */
1538
1539 static void sis900_tx_timeout(struct net_device *net_dev)
1540 {
1541 struct sis900_private *sis_priv = netdev_priv(net_dev);
1542 void __iomem *ioaddr = sis_priv->ioaddr;
1543 unsigned long flags;
1544 int i;
1545
1546 if (netif_msg_tx_err(sis_priv)) {
1547 printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x\n",
1548 net_dev->name, sr32(cr), sr32(isr));
1549 }
1550
1551 /* Disable interrupts by clearing the interrupt mask. */
1552 sw32(imr, 0x0000);
1553
1554 /* use spinlock to prevent interrupt handler accessing buffer ring */
1555 spin_lock_irqsave(&sis_priv->lock, flags);
1556
1557 /* discard unsent packets */
1558 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1559 for (i = 0; i < NUM_TX_DESC; i++) {
1560 struct sk_buff *skb = sis_priv->tx_skbuff[i];
1561
1562 if (skb) {
1563 pci_unmap_single(sis_priv->pci_dev,
1564 sis_priv->tx_ring[i].bufptr, skb->len,
1565 PCI_DMA_TODEVICE);
1566 dev_kfree_skb_irq(skb);
1567 sis_priv->tx_skbuff[i] = NULL;
1568 sis_priv->tx_ring[i].cmdsts = 0;
1569 sis_priv->tx_ring[i].bufptr = 0;
1570 net_dev->stats.tx_dropped++;
1571 }
1572 }
1573 sis_priv->tx_full = 0;
1574 netif_wake_queue(net_dev);
1575
1576 spin_unlock_irqrestore(&sis_priv->lock, flags);
1577
1578 netif_trans_update(net_dev); /* prevent tx timeout */
1579
1580 /* load Transmit Descriptor Register */
1581 sw32(txdp, sis_priv->tx_ring_dma);
1582
1583 /* Enable all known interrupts by setting the interrupt mask. */
1584 sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE);
1585 }
1586
1587 /**
1588 * sis900_start_xmit - sis900 start transmit routine
1589 * @skb: socket buffer pointer to put the data being transmitted
1590 * @net_dev: the net device to transmit with
1591 *
1592 * Set the transmit buffer descriptor,
1593 * and write TxENA to enable transmit state machine.
1594 * tell upper layer if the buffer is full
1595 */
1596
1597 static netdev_tx_t
1598 sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
1599 {
1600 struct sis900_private *sis_priv = netdev_priv(net_dev);
1601 void __iomem *ioaddr = sis_priv->ioaddr;
1602 unsigned int entry;
1603 unsigned long flags;
1604 unsigned int index_cur_tx, index_dirty_tx;
1605 unsigned int count_dirty_tx;
1606
1607 spin_lock_irqsave(&sis_priv->lock, flags);
1608
1609 /* Calculate the next Tx descriptor entry. */
1610 entry = sis_priv->cur_tx % NUM_TX_DESC;
1611 sis_priv->tx_skbuff[entry] = skb;
1612
1613 /* set the transmit buffer descriptor and enable Transmit State Machine */
1614 sis_priv->tx_ring[entry].bufptr = pci_map_single(sis_priv->pci_dev,
1615 skb->data, skb->len, PCI_DMA_TODEVICE);
1616 if (unlikely(pci_dma_mapping_error(sis_priv->pci_dev,
1617 sis_priv->tx_ring[entry].bufptr))) {
1618 dev_kfree_skb_any(skb);
1619 sis_priv->tx_skbuff[entry] = NULL;
1620 net_dev->stats.tx_dropped++;
1621 spin_unlock_irqrestore(&sis_priv->lock, flags);
1622 return NETDEV_TX_OK;
1623 }
1624 sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
1625 sw32(cr, TxENA | sr32(cr));
1626
1627 sis_priv->cur_tx ++;
1628 index_cur_tx = sis_priv->cur_tx;
1629 index_dirty_tx = sis_priv->dirty_tx;
1630
1631 for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
1632 count_dirty_tx ++;
1633
1634 if (index_cur_tx == index_dirty_tx) {
1635 /* dirty_tx is met in the cycle of cur_tx, buffer full */
1636 sis_priv->tx_full = 1;
1637 netif_stop_queue(net_dev);
1638 } else if (count_dirty_tx < NUM_TX_DESC) {
1639 /* Typical path, tell upper layer that more transmission is possible */
1640 netif_start_queue(net_dev);
1641 } else {
1642 /* buffer full, tell upper layer no more transmission */
1643 sis_priv->tx_full = 1;
1644 netif_stop_queue(net_dev);
1645 }
1646
1647 spin_unlock_irqrestore(&sis_priv->lock, flags);
1648
1649 if (netif_msg_tx_queued(sis_priv))
1650 printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
1651 "to slot %d.\n",
1652 net_dev->name, skb->data, (int)skb->len, entry);
1653
1654 return NETDEV_TX_OK;
1655 }
1656
1657 /**
1658 * sis900_interrupt - sis900 interrupt handler
1659 * @irq: the irq number
1660 * @dev_instance: the client data object
1661 *
1662 * The interrupt handler does all of the Rx thread work,
1663 * and cleans up after the Tx thread
1664 */
1665
1666 static irqreturn_t sis900_interrupt(int irq, void *dev_instance)
1667 {
1668 struct net_device *net_dev = dev_instance;
1669 struct sis900_private *sis_priv = netdev_priv(net_dev);
1670 int boguscnt = max_interrupt_work;
1671 void __iomem *ioaddr = sis_priv->ioaddr;
1672 u32 status;
1673 unsigned int handled = 0;
1674
1675 spin_lock (&sis_priv->lock);
1676
1677 do {
1678 status = sr32(isr);
1679
1680 if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0)
1681 /* nothing intresting happened */
1682 break;
1683 handled = 1;
1684
1685 /* why dow't we break after Tx/Rx case ?? keyword: full-duplex */
1686 if (status & (RxORN | RxERR | RxOK))
1687 /* Rx interrupt */
1688 sis900_rx(net_dev);
1689
1690 if (status & (TxURN | TxERR | TxIDLE))
1691 /* Tx interrupt */
1692 sis900_finish_xmit(net_dev);
1693
1694 /* something strange happened !!! */
1695 if (status & HIBERR) {
1696 if(netif_msg_intr(sis_priv))
1697 printk(KERN_INFO "%s: Abnormal interrupt, "
1698 "status %#8.8x.\n", net_dev->name, status);
1699 break;
1700 }
1701 if (--boguscnt < 0) {
1702 if(netif_msg_intr(sis_priv))
1703 printk(KERN_INFO "%s: Too much work at interrupt, "
1704 "interrupt status = %#8.8x.\n",
1705 net_dev->name, status);
1706 break;
1707 }
1708 } while (1);
1709
1710 if(netif_msg_intr(sis_priv))
1711 printk(KERN_DEBUG "%s: exiting interrupt, "
1712 "interrupt status = %#8.8x\n",
1713 net_dev->name, sr32(isr));
1714
1715 spin_unlock (&sis_priv->lock);
1716 return IRQ_RETVAL(handled);
1717 }
1718
1719 /**
1720 * sis900_rx - sis900 receive routine
1721 * @net_dev: the net device which receives data
1722 *
1723 * Process receive interrupt events,
1724 * put buffer to higher layer and refill buffer pool
1725 * Note: This function is called by interrupt handler,
1726 * don't do "too much" work here
1727 */
1728
1729 static int sis900_rx(struct net_device *net_dev)
1730 {
1731 struct sis900_private *sis_priv = netdev_priv(net_dev);
1732 void __iomem *ioaddr = sis_priv->ioaddr;
1733 unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
1734 u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
1735 int rx_work_limit;
1736
1737 if (netif_msg_rx_status(sis_priv))
1738 printk(KERN_DEBUG "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
1739 "status:0x%8.8x\n",
1740 sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
1741 rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
1742
1743 while (rx_status & OWN) {
1744 unsigned int rx_size;
1745 unsigned int data_size;
1746
1747 if (--rx_work_limit < 0)
1748 break;
1749
1750 data_size = rx_status & DSIZE;
1751 rx_size = data_size - CRC_SIZE;
1752
1753 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1754 /* ``TOOLONG'' flag means jumbo packet received. */
1755 if ((rx_status & TOOLONG) && data_size <= MAX_FRAME_SIZE)
1756 rx_status &= (~ ((unsigned int)TOOLONG));
1757 #endif
1758
1759 if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
1760 /* corrupted packet received */
1761 if (netif_msg_rx_err(sis_priv))
1762 printk(KERN_DEBUG "%s: Corrupted packet "
1763 "received, buffer status = 0x%8.8x/%d.\n",
1764 net_dev->name, rx_status, data_size);
1765 net_dev->stats.rx_errors++;
1766 if (rx_status & OVERRUN)
1767 net_dev->stats.rx_over_errors++;
1768 if (rx_status & (TOOLONG|RUNT))
1769 net_dev->stats.rx_length_errors++;
1770 if (rx_status & (RXISERR | FAERR))
1771 net_dev->stats.rx_frame_errors++;
1772 if (rx_status & CRCERR)
1773 net_dev->stats.rx_crc_errors++;
1774 /* reset buffer descriptor state */
1775 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1776 } else {
1777 struct sk_buff * skb;
1778 struct sk_buff * rx_skb;
1779
1780 pci_unmap_single(sis_priv->pci_dev,
1781 sis_priv->rx_ring[entry].bufptr, RX_BUF_SIZE,
1782 PCI_DMA_FROMDEVICE);
1783
1784 /* refill the Rx buffer, what if there is not enough
1785 * memory for new socket buffer ?? */
1786 if ((skb = netdev_alloc_skb(net_dev, RX_BUF_SIZE)) == NULL) {
1787 /*
1788 * Not enough memory to refill the buffer
1789 * so we need to recycle the old one so
1790 * as to avoid creating a memory hole
1791 * in the rx ring
1792 */
1793 skb = sis_priv->rx_skbuff[entry];
1794 net_dev->stats.rx_dropped++;
1795 goto refill_rx_ring;
1796 }
1797
1798 /* This situation should never happen, but due to
1799 some unknown bugs, it is possible that
1800 we are working on NULL sk_buff :-( */
1801 if (sis_priv->rx_skbuff[entry] == NULL) {
1802 if (netif_msg_rx_err(sis_priv))
1803 printk(KERN_WARNING "%s: NULL pointer "
1804 "encountered in Rx ring\n"
1805 "cur_rx:%4.4d, dirty_rx:%4.4d\n",
1806 net_dev->name, sis_priv->cur_rx,
1807 sis_priv->dirty_rx);
1808 dev_kfree_skb(skb);
1809 break;
1810 }
1811
1812 /* give the socket buffer to upper layers */
1813 rx_skb = sis_priv->rx_skbuff[entry];
1814 skb_put(rx_skb, rx_size);
1815 rx_skb->protocol = eth_type_trans(rx_skb, net_dev);
1816 netif_rx(rx_skb);
1817
1818 /* some network statistics */
1819 if ((rx_status & BCAST) == MCAST)
1820 net_dev->stats.multicast++;
1821 net_dev->stats.rx_bytes += rx_size;
1822 net_dev->stats.rx_packets++;
1823 sis_priv->dirty_rx++;
1824 refill_rx_ring:
1825 sis_priv->rx_skbuff[entry] = skb;
1826 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1827 sis_priv->rx_ring[entry].bufptr =
1828 pci_map_single(sis_priv->pci_dev, skb->data,
1829 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1830 if (unlikely(pci_dma_mapping_error(sis_priv->pci_dev,
1831 sis_priv->rx_ring[entry].bufptr))) {
1832 dev_kfree_skb_irq(skb);
1833 sis_priv->rx_skbuff[entry] = NULL;
1834 break;
1835 }
1836 }
1837 sis_priv->cur_rx++;
1838 entry = sis_priv->cur_rx % NUM_RX_DESC;
1839 rx_status = sis_priv->rx_ring[entry].cmdsts;
1840 } // while
1841
1842 /* refill the Rx buffer, what if the rate of refilling is slower
1843 * than consuming ?? */
1844 for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
1845 struct sk_buff *skb;
1846
1847 entry = sis_priv->dirty_rx % NUM_RX_DESC;
1848
1849 if (sis_priv->rx_skbuff[entry] == NULL) {
1850 skb = netdev_alloc_skb(net_dev, RX_BUF_SIZE);
1851 if (skb == NULL) {
1852 /* not enough memory for skbuff, this makes a
1853 * "hole" on the buffer ring, it is not clear
1854 * how the hardware will react to this kind
1855 * of degenerated buffer */
1856 net_dev->stats.rx_dropped++;
1857 break;
1858 }
1859 sis_priv->rx_skbuff[entry] = skb;
1860 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1861 sis_priv->rx_ring[entry].bufptr =
1862 pci_map_single(sis_priv->pci_dev, skb->data,
1863 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1864 if (unlikely(pci_dma_mapping_error(sis_priv->pci_dev,
1865 sis_priv->rx_ring[entry].bufptr))) {
1866 dev_kfree_skb_irq(skb);
1867 sis_priv->rx_skbuff[entry] = NULL;
1868 break;
1869 }
1870 }
1871 }
1872 /* re-enable the potentially idle receive state matchine */
1873 sw32(cr , RxENA | sr32(cr));
1874
1875 return 0;
1876 }
1877
1878 /**
1879 * sis900_finish_xmit - finish up transmission of packets
1880 * @net_dev: the net device to be transmitted on
1881 *
1882 * Check for error condition and free socket buffer etc
1883 * schedule for more transmission as needed
1884 * Note: This function is called by interrupt handler,
1885 * don't do "too much" work here
1886 */
1887
1888 static void sis900_finish_xmit (struct net_device *net_dev)
1889 {
1890 struct sis900_private *sis_priv = netdev_priv(net_dev);
1891
1892 for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
1893 struct sk_buff *skb;
1894 unsigned int entry;
1895 u32 tx_status;
1896
1897 entry = sis_priv->dirty_tx % NUM_TX_DESC;
1898 tx_status = sis_priv->tx_ring[entry].cmdsts;
1899
1900 if (tx_status & OWN) {
1901 /* The packet is not transmitted yet (owned by hardware) !
1902 * Note: the interrupt is generated only when Tx Machine
1903 * is idle, so this is an almost impossible case */
1904 break;
1905 }
1906
1907 if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
1908 /* packet unsuccessfully transmitted */
1909 if (netif_msg_tx_err(sis_priv))
1910 printk(KERN_DEBUG "%s: Transmit "
1911 "error, Tx status %8.8x.\n",
1912 net_dev->name, tx_status);
1913 net_dev->stats.tx_errors++;
1914 if (tx_status & UNDERRUN)
1915 net_dev->stats.tx_fifo_errors++;
1916 if (tx_status & ABORT)
1917 net_dev->stats.tx_aborted_errors++;
1918 if (tx_status & NOCARRIER)
1919 net_dev->stats.tx_carrier_errors++;
1920 if (tx_status & OWCOLL)
1921 net_dev->stats.tx_window_errors++;
1922 } else {
1923 /* packet successfully transmitted */
1924 net_dev->stats.collisions += (tx_status & COLCNT) >> 16;
1925 net_dev->stats.tx_bytes += tx_status & DSIZE;
1926 net_dev->stats.tx_packets++;
1927 }
1928 /* Free the original skb. */
1929 skb = sis_priv->tx_skbuff[entry];
1930 pci_unmap_single(sis_priv->pci_dev,
1931 sis_priv->tx_ring[entry].bufptr, skb->len,
1932 PCI_DMA_TODEVICE);
1933 dev_kfree_skb_irq(skb);
1934 sis_priv->tx_skbuff[entry] = NULL;
1935 sis_priv->tx_ring[entry].bufptr = 0;
1936 sis_priv->tx_ring[entry].cmdsts = 0;
1937 }
1938
1939 if (sis_priv->tx_full && netif_queue_stopped(net_dev) &&
1940 sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
1941 /* The ring is no longer full, clear tx_full and schedule
1942 * more transmission by netif_wake_queue(net_dev) */
1943 sis_priv->tx_full = 0;
1944 netif_wake_queue (net_dev);
1945 }
1946 }
1947
1948 /**
1949 * sis900_close - close sis900 device
1950 * @net_dev: the net device to be closed
1951 *
1952 * Disable interrupts, stop the Tx and Rx Status Machine
1953 * free Tx and RX socket buffer
1954 */
1955
1956 static int sis900_close(struct net_device *net_dev)
1957 {
1958 struct sis900_private *sis_priv = netdev_priv(net_dev);
1959 struct pci_dev *pdev = sis_priv->pci_dev;
1960 void __iomem *ioaddr = sis_priv->ioaddr;
1961 struct sk_buff *skb;
1962 int i;
1963
1964 netif_stop_queue(net_dev);
1965
1966 /* Disable interrupts by clearing the interrupt mask. */
1967 sw32(imr, 0x0000);
1968 sw32(ier, 0x0000);
1969
1970 /* Stop the chip's Tx and Rx Status Machine */
1971 sw32(cr, RxDIS | TxDIS | sr32(cr));
1972
1973 del_timer(&sis_priv->timer);
1974
1975 free_irq(pdev->irq, net_dev);
1976
1977 /* Free Tx and RX skbuff */
1978 for (i = 0; i < NUM_RX_DESC; i++) {
1979 skb = sis_priv->rx_skbuff[i];
1980 if (skb) {
1981 pci_unmap_single(pdev, sis_priv->rx_ring[i].bufptr,
1982 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1983 dev_kfree_skb(skb);
1984 sis_priv->rx_skbuff[i] = NULL;
1985 }
1986 }
1987 for (i = 0; i < NUM_TX_DESC; i++) {
1988 skb = sis_priv->tx_skbuff[i];
1989 if (skb) {
1990 pci_unmap_single(pdev, sis_priv->tx_ring[i].bufptr,
1991 skb->len, PCI_DMA_TODEVICE);
1992 dev_kfree_skb(skb);
1993 sis_priv->tx_skbuff[i] = NULL;
1994 }
1995 }
1996
1997 /* Green! Put the chip in low-power mode. */
1998
1999 return 0;
2000 }
2001
2002 /**
2003 * sis900_get_drvinfo - Return information about driver
2004 * @net_dev: the net device to probe
2005 * @info: container for info returned
2006 *
2007 * Process ethtool command such as "ehtool -i" to show information
2008 */
2009
2010 static void sis900_get_drvinfo(struct net_device *net_dev,
2011 struct ethtool_drvinfo *info)
2012 {
2013 struct sis900_private *sis_priv = netdev_priv(net_dev);
2014
2015 strlcpy(info->driver, SIS900_MODULE_NAME, sizeof(info->driver));
2016 strlcpy(info->version, SIS900_DRV_VERSION, sizeof(info->version));
2017 strlcpy(info->bus_info, pci_name(sis_priv->pci_dev),
2018 sizeof(info->bus_info));
2019 }
2020
2021 static u32 sis900_get_msglevel(struct net_device *net_dev)
2022 {
2023 struct sis900_private *sis_priv = netdev_priv(net_dev);
2024 return sis_priv->msg_enable;
2025 }
2026
2027 static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
2028 {
2029 struct sis900_private *sis_priv = netdev_priv(net_dev);
2030 sis_priv->msg_enable = value;
2031 }
2032
2033 static u32 sis900_get_link(struct net_device *net_dev)
2034 {
2035 struct sis900_private *sis_priv = netdev_priv(net_dev);
2036 return mii_link_ok(&sis_priv->mii_info);
2037 }
2038
2039 static int sis900_get_settings(struct net_device *net_dev,
2040 struct ethtool_cmd *cmd)
2041 {
2042 struct sis900_private *sis_priv = netdev_priv(net_dev);
2043 spin_lock_irq(&sis_priv->lock);
2044 mii_ethtool_gset(&sis_priv->mii_info, cmd);
2045 spin_unlock_irq(&sis_priv->lock);
2046 return 0;
2047 }
2048
2049 static int sis900_set_settings(struct net_device *net_dev,
2050 struct ethtool_cmd *cmd)
2051 {
2052 struct sis900_private *sis_priv = netdev_priv(net_dev);
2053 int rt;
2054 spin_lock_irq(&sis_priv->lock);
2055 rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
2056 spin_unlock_irq(&sis_priv->lock);
2057 return rt;
2058 }
2059
2060 static int sis900_nway_reset(struct net_device *net_dev)
2061 {
2062 struct sis900_private *sis_priv = netdev_priv(net_dev);
2063 return mii_nway_restart(&sis_priv->mii_info);
2064 }
2065
2066 /**
2067 * sis900_set_wol - Set up Wake on Lan registers
2068 * @net_dev: the net device to probe
2069 * @wol: container for info passed to the driver
2070 *
2071 * Process ethtool command "wol" to setup wake on lan features.
2072 * SiS900 supports sending WoL events if a correct packet is received,
2073 * but there is no simple way to filter them to only a subset (broadcast,
2074 * multicast, unicast or arp).
2075 */
2076
2077 static int sis900_set_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2078 {
2079 struct sis900_private *sis_priv = netdev_priv(net_dev);
2080 void __iomem *ioaddr = sis_priv->ioaddr;
2081 u32 cfgpmcsr = 0, pmctrl_bits = 0;
2082
2083 if (wol->wolopts == 0) {
2084 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
2085 cfgpmcsr &= ~PME_EN;
2086 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2087 sw32(pmctrl, pmctrl_bits);
2088 if (netif_msg_wol(sis_priv))
2089 printk(KERN_DEBUG "%s: Wake on LAN disabled\n", net_dev->name);
2090 return 0;
2091 }
2092
2093 if (wol->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST
2094 | WAKE_BCAST | WAKE_ARP))
2095 return -EINVAL;
2096
2097 if (wol->wolopts & WAKE_MAGIC)
2098 pmctrl_bits |= MAGICPKT;
2099 if (wol->wolopts & WAKE_PHY)
2100 pmctrl_bits |= LINKON;
2101
2102 sw32(pmctrl, pmctrl_bits);
2103
2104 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
2105 cfgpmcsr |= PME_EN;
2106 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2107 if (netif_msg_wol(sis_priv))
2108 printk(KERN_DEBUG "%s: Wake on LAN enabled\n", net_dev->name);
2109
2110 return 0;
2111 }
2112
2113 static void sis900_get_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2114 {
2115 struct sis900_private *sp = netdev_priv(net_dev);
2116 void __iomem *ioaddr = sp->ioaddr;
2117 u32 pmctrl_bits;
2118
2119 pmctrl_bits = sr32(pmctrl);
2120 if (pmctrl_bits & MAGICPKT)
2121 wol->wolopts |= WAKE_MAGIC;
2122 if (pmctrl_bits & LINKON)
2123 wol->wolopts |= WAKE_PHY;
2124
2125 wol->supported = (WAKE_PHY | WAKE_MAGIC);
2126 }
2127
2128 static const struct ethtool_ops sis900_ethtool_ops = {
2129 .get_drvinfo = sis900_get_drvinfo,
2130 .get_msglevel = sis900_get_msglevel,
2131 .set_msglevel = sis900_set_msglevel,
2132 .get_link = sis900_get_link,
2133 .get_settings = sis900_get_settings,
2134 .set_settings = sis900_set_settings,
2135 .nway_reset = sis900_nway_reset,
2136 .get_wol = sis900_get_wol,
2137 .set_wol = sis900_set_wol
2138 };
2139
2140 /**
2141 * mii_ioctl - process MII i/o control command
2142 * @net_dev: the net device to command for
2143 * @rq: parameter for command
2144 * @cmd: the i/o command
2145 *
2146 * Process MII command like read/write MII register
2147 */
2148
2149 static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
2150 {
2151 struct sis900_private *sis_priv = netdev_priv(net_dev);
2152 struct mii_ioctl_data *data = if_mii(rq);
2153
2154 switch(cmd) {
2155 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2156 data->phy_id = sis_priv->mii->phy_addr;
2157 /* Fall Through */
2158
2159 case SIOCGMIIREG: /* Read MII PHY register. */
2160 data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
2161 return 0;
2162
2163 case SIOCSMIIREG: /* Write MII PHY register. */
2164 mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
2165 return 0;
2166 default:
2167 return -EOPNOTSUPP;
2168 }
2169 }
2170
2171 /**
2172 * sis900_set_config - Set media type by net_device.set_config
2173 * @dev: the net device for media type change
2174 * @map: ifmap passed by ifconfig
2175 *
2176 * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
2177 * we support only port changes. All other runtime configuration
2178 * changes will be ignored
2179 */
2180
2181 static int sis900_set_config(struct net_device *dev, struct ifmap *map)
2182 {
2183 struct sis900_private *sis_priv = netdev_priv(dev);
2184 struct mii_phy *mii_phy = sis_priv->mii;
2185
2186 u16 status;
2187
2188 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
2189 /* we switch on the ifmap->port field. I couldn't find anything
2190 * like a definition or standard for the values of that field.
2191 * I think the meaning of those values is device specific. But
2192 * since I would like to change the media type via the ifconfig
2193 * command I use the definition from linux/netdevice.h
2194 * (which seems to be different from the ifport(pcmcia) definition) */
2195 switch(map->port){
2196 case IF_PORT_UNKNOWN: /* use auto here */
2197 dev->if_port = map->port;
2198 /* we are going to change the media type, so the Link
2199 * will be temporary down and we need to reflect that
2200 * here. When the Link comes up again, it will be
2201 * sensed by the sis_timer procedure, which also does
2202 * all the rest for us */
2203 netif_carrier_off(dev);
2204
2205 /* read current state */
2206 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2207
2208 /* enable auto negotiation and reset the negotioation
2209 * (I don't really know what the auto negatiotiation
2210 * reset really means, but it sounds for me right to
2211 * do one here) */
2212 mdio_write(dev, mii_phy->phy_addr,
2213 MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
2214
2215 break;
2216
2217 case IF_PORT_10BASET: /* 10BaseT */
2218 dev->if_port = map->port;
2219
2220 /* we are going to change the media type, so the Link
2221 * will be temporary down and we need to reflect that
2222 * here. When the Link comes up again, it will be
2223 * sensed by the sis_timer procedure, which also does
2224 * all the rest for us */
2225 netif_carrier_off(dev);
2226
2227 /* set Speed to 10Mbps */
2228 /* read current state */
2229 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2230
2231 /* disable auto negotiation and force 10MBit mode*/
2232 mdio_write(dev, mii_phy->phy_addr,
2233 MII_CONTROL, status & ~(MII_CNTL_SPEED |
2234 MII_CNTL_AUTO));
2235 break;
2236
2237 case IF_PORT_100BASET: /* 100BaseT */
2238 case IF_PORT_100BASETX: /* 100BaseTx */
2239 dev->if_port = map->port;
2240
2241 /* we are going to change the media type, so the Link
2242 * will be temporary down and we need to reflect that
2243 * here. When the Link comes up again, it will be
2244 * sensed by the sis_timer procedure, which also does
2245 * all the rest for us */
2246 netif_carrier_off(dev);
2247
2248 /* set Speed to 100Mbps */
2249 /* disable auto negotiation and enable 100MBit Mode */
2250 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2251 mdio_write(dev, mii_phy->phy_addr,
2252 MII_CONTROL, (status & ~MII_CNTL_SPEED) |
2253 MII_CNTL_SPEED);
2254
2255 break;
2256
2257 case IF_PORT_10BASE2: /* 10Base2 */
2258 case IF_PORT_AUI: /* AUI */
2259 case IF_PORT_100BASEFX: /* 100BaseFx */
2260 /* These Modes are not supported (are they?)*/
2261 return -EOPNOTSUPP;
2262
2263 default:
2264 return -EINVAL;
2265 }
2266 }
2267 return 0;
2268 }
2269
2270 /**
2271 * sis900_mcast_bitnr - compute hashtable index
2272 * @addr: multicast address
2273 * @revision: revision id of chip
2274 *
2275 * SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
2276 * hash table, which makes this function a little bit different from other drivers
2277 * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
2278 * multicast hash table.
2279 */
2280
2281 static inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
2282 {
2283
2284 u32 crc = ether_crc(6, addr);
2285
2286 /* leave 8 or 7 most siginifant bits */
2287 if ((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
2288 return (int)(crc >> 24);
2289 else
2290 return (int)(crc >> 25);
2291 }
2292
2293 /**
2294 * set_rx_mode - Set SiS900 receive mode
2295 * @net_dev: the net device to be set
2296 *
2297 * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
2298 * And set the appropriate multicast filter.
2299 * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
2300 */
2301
2302 static void set_rx_mode(struct net_device *net_dev)
2303 {
2304 struct sis900_private *sis_priv = netdev_priv(net_dev);
2305 void __iomem *ioaddr = sis_priv->ioaddr;
2306 u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
2307 int i, table_entries;
2308 u32 rx_mode;
2309
2310 /* 635 Hash Table entries = 256(2^16) */
2311 if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
2312 (sis_priv->chipset_rev == SIS900B_900_REV))
2313 table_entries = 16;
2314 else
2315 table_entries = 8;
2316
2317 if (net_dev->flags & IFF_PROMISC) {
2318 /* Accept any kinds of packets */
2319 rx_mode = RFPromiscuous;
2320 for (i = 0; i < table_entries; i++)
2321 mc_filter[i] = 0xffff;
2322 } else if ((netdev_mc_count(net_dev) > multicast_filter_limit) ||
2323 (net_dev->flags & IFF_ALLMULTI)) {
2324 /* too many multicast addresses or accept all multicast packet */
2325 rx_mode = RFAAB | RFAAM;
2326 for (i = 0; i < table_entries; i++)
2327 mc_filter[i] = 0xffff;
2328 } else {
2329 /* Accept Broadcast packet, destination address matchs our
2330 * MAC address, use Receive Filter to reject unwanted MCAST
2331 * packets */
2332 struct netdev_hw_addr *ha;
2333 rx_mode = RFAAB;
2334
2335 netdev_for_each_mc_addr(ha, net_dev) {
2336 unsigned int bit_nr;
2337
2338 bit_nr = sis900_mcast_bitnr(ha->addr,
2339 sis_priv->chipset_rev);
2340 mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
2341 }
2342 }
2343
2344 /* update Multicast Hash Table in Receive Filter */
2345 for (i = 0; i < table_entries; i++) {
2346 /* why plus 0x04 ??, That makes the correct value for hash table. */
2347 sw32(rfcr, (u32)(0x00000004 + i) << RFADDR_shift);
2348 sw32(rfdr, mc_filter[i]);
2349 }
2350
2351 sw32(rfcr, RFEN | rx_mode);
2352
2353 /* sis900 is capable of looping back packets at MAC level for
2354 * debugging purpose */
2355 if (net_dev->flags & IFF_LOOPBACK) {
2356 u32 cr_saved;
2357 /* We must disable Tx/Rx before setting loopback mode */
2358 cr_saved = sr32(cr);
2359 sw32(cr, cr_saved | TxDIS | RxDIS);
2360 /* enable loopback */
2361 sw32(txcfg, sr32(txcfg) | TxMLB);
2362 sw32(rxcfg, sr32(rxcfg) | RxATX);
2363 /* restore cr */
2364 sw32(cr, cr_saved);
2365 }
2366 }
2367
2368 /**
2369 * sis900_reset - Reset sis900 MAC
2370 * @net_dev: the net device to reset
2371 *
2372 * reset sis900 MAC and wait until finished
2373 * reset through command register
2374 * change backoff algorithm for 900B0 & 635 M/B
2375 */
2376
2377 static void sis900_reset(struct net_device *net_dev)
2378 {
2379 struct sis900_private *sis_priv = netdev_priv(net_dev);
2380 void __iomem *ioaddr = sis_priv->ioaddr;
2381 u32 status = TxRCMP | RxRCMP;
2382 int i;
2383
2384 sw32(ier, 0);
2385 sw32(imr, 0);
2386 sw32(rfcr, 0);
2387
2388 sw32(cr, RxRESET | TxRESET | RESET | sr32(cr));
2389
2390 /* Check that the chip has finished the reset. */
2391 for (i = 0; status && (i < 1000); i++)
2392 status ^= sr32(isr) & status;
2393
2394 if (sis_priv->chipset_rev >= SIS635A_900_REV ||
2395 sis_priv->chipset_rev == SIS900B_900_REV)
2396 sw32(cfg, PESEL | RND_CNT);
2397 else
2398 sw32(cfg, PESEL);
2399 }
2400
2401 /**
2402 * sis900_remove - Remove sis900 device
2403 * @pci_dev: the pci device to be removed
2404 *
2405 * remove and release SiS900 net device
2406 */
2407
2408 static void sis900_remove(struct pci_dev *pci_dev)
2409 {
2410 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2411 struct sis900_private *sis_priv = netdev_priv(net_dev);
2412
2413 unregister_netdev(net_dev);
2414
2415 while (sis_priv->first_mii) {
2416 struct mii_phy *phy = sis_priv->first_mii;
2417
2418 sis_priv->first_mii = phy->next;
2419 kfree(phy);
2420 }
2421
2422 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
2423 sis_priv->rx_ring_dma);
2424 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
2425 sis_priv->tx_ring_dma);
2426 pci_iounmap(pci_dev, sis_priv->ioaddr);
2427 free_netdev(net_dev);
2428 pci_release_regions(pci_dev);
2429 }
2430
2431 #ifdef CONFIG_PM
2432
2433 static int sis900_suspend(struct pci_dev *pci_dev, pm_message_t state)
2434 {
2435 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2436 struct sis900_private *sis_priv = netdev_priv(net_dev);
2437 void __iomem *ioaddr = sis_priv->ioaddr;
2438
2439 if(!netif_running(net_dev))
2440 return 0;
2441
2442 netif_stop_queue(net_dev);
2443 netif_device_detach(net_dev);
2444
2445 /* Stop the chip's Tx and Rx Status Machine */
2446 sw32(cr, RxDIS | TxDIS | sr32(cr));
2447
2448 pci_set_power_state(pci_dev, PCI_D3hot);
2449 pci_save_state(pci_dev);
2450
2451 return 0;
2452 }
2453
2454 static int sis900_resume(struct pci_dev *pci_dev)
2455 {
2456 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2457 struct sis900_private *sis_priv = netdev_priv(net_dev);
2458 void __iomem *ioaddr = sis_priv->ioaddr;
2459
2460 if(!netif_running(net_dev))
2461 return 0;
2462 pci_restore_state(pci_dev);
2463 pci_set_power_state(pci_dev, PCI_D0);
2464
2465 sis900_init_rxfilter(net_dev);
2466
2467 sis900_init_tx_ring(net_dev);
2468 sis900_init_rx_ring(net_dev);
2469
2470 set_rx_mode(net_dev);
2471
2472 netif_device_attach(net_dev);
2473 netif_start_queue(net_dev);
2474
2475 /* Workaround for EDB */
2476 sis900_set_mode(sis_priv, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
2477
2478 /* Enable all known interrupts by setting the interrupt mask. */
2479 sw32(imr, RxSOVR | RxORN | RxERR | RxOK | TxURN | TxERR | TxIDLE);
2480 sw32(cr, RxENA | sr32(cr));
2481 sw32(ier, IE);
2482
2483 sis900_check_mode(net_dev, sis_priv->mii);
2484
2485 return 0;
2486 }
2487 #endif /* CONFIG_PM */
2488
2489 static struct pci_driver sis900_pci_driver = {
2490 .name = SIS900_MODULE_NAME,
2491 .id_table = sis900_pci_tbl,
2492 .probe = sis900_probe,
2493 .remove = sis900_remove,
2494 #ifdef CONFIG_PM
2495 .suspend = sis900_suspend,
2496 .resume = sis900_resume,
2497 #endif /* CONFIG_PM */
2498 };
2499
2500 static int __init sis900_init_module(void)
2501 {
2502 /* when a module, this is printed whether or not devices are found in probe */
2503 #ifdef MODULE
2504 printk(version);
2505 #endif
2506
2507 return pci_register_driver(&sis900_pci_driver);
2508 }
2509
2510 static void __exit sis900_cleanup_module(void)
2511 {
2512 pci_unregister_driver(&sis900_pci_driver);
2513 }
2514
2515 module_init(sis900_init_module);
2516 module_exit(sis900_cleanup_module);
2517
Linux kernel - Deliverables
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