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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* sis900.c: A SiS 900/7016 PCI Fast Ethernet driver for Linux.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002 Copyright 1999 Silicon Integrated System Corporation
Daniele Venzanod269a692006-04-17 10:28:06 +02003 Revision: 1.08.10 Apr. 2 2006
Jeff Garzik6aa20a22006-09-13 13:24:59 -04004
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 Modified from the driver which is originally written by Donald Becker.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04006
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 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.
Jeff Garzik6aa20a22006-09-13 13:24:59 -040011
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 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
Jeff Garzik6aa20a22006-09-13 13:24:59 -040032 Rev 1.07.10 Mar. 1 2001 Hui-Fen Hsu <hfhsu@sis.com.tw> some bug fix & 635M/B support
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 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>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040055#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#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>
Tobias Klauser12b279f2005-04-04 18:10:18 +020072#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
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"
Daniele Venzanod269a692006-04-17 10:28:06 +020082#define SIS900_DRV_VERSION "v1.08.10 Apr. 2 2006"
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Stephen Hemminger9a3c3de2009-02-26 10:19:26 +000084static const char version[] __devinitconst =
85 KERN_INFO "sis900.c: " SIS900_DRV_VERSION "\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87static int max_interrupt_work = 40;
88static int multicast_filter_limit = 128;
89
90static 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101enum {
102 SIS_900 = 0,
103 SIS_7016
104};
Arjan van de Venf71e1302006-03-03 21:33:57 -0500105static const char * card_names[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 "SiS 900 PCI Fast Ethernet",
107 "SiS 7016 PCI Fast Ethernet"
108};
Alexey Dobriyana3aa1882010-01-07 11:58:11 +0000109static DEFINE_PCI_DEVICE_TABLE(sis900_pci_tbl) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_900,
111 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_900},
112 {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7016,
113 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7016},
114 {0,}
115};
116MODULE_DEVICE_TABLE (pci, sis900_pci_tbl);
117
118static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex);
119
Arjan van de Venf71e1302006-03-03 21:33:57 -0500120static const struct mii_chip_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 const char * name;
122 u16 phy_id0;
123 u16 phy_id1;
124 u8 phy_types;
125#define HOME 0x0001
126#define LAN 0x0002
127#define MIX 0x0003
128#define UNKNOWN 0x0
129} mii_chip_table[] = {
130 { "SiS 900 Internal MII PHY", 0x001d, 0x8000, LAN },
131 { "SiS 7014 Physical Layer Solution", 0x0016, 0xf830, LAN },
James Camerond8e95e52006-05-10 13:33:29 -0700132 { "SiS 900 on Foxconn 661 7MI", 0x0143, 0xBC70, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 { "Altimata AC101LF PHY", 0x0022, 0x5520, LAN },
Artur Skawina494aced2006-03-21 22:04:36 +0100134 { "ADM 7001 LAN PHY", 0x002e, 0xcc60, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 { "AMD 79C901 10BASE-T PHY", 0x0000, 0x6B70, LAN },
136 { "AMD 79C901 HomePNA PHY", 0x0000, 0x6B90, HOME},
137 { "ICS LAN PHY", 0x0015, 0xF440, LAN },
Daniele Venzano80a80032006-08-12 11:17:03 +0200138 { "ICS LAN PHY", 0x0143, 0xBC70, LAN },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 { "NS 83851 PHY", 0x2000, 0x5C20, MIX },
140 { "NS 83847 PHY", 0x2000, 0x5C30, MIX },
141 { "Realtek RTL8201 PHY", 0x0000, 0x8200, LAN },
142 { "VIA 6103 PHY", 0x0101, 0x8f20, LAN },
143 {NULL,},
144};
145
146struct mii_phy {
147 struct mii_phy * next;
148 int phy_addr;
149 u16 phy_id0;
150 u16 phy_id1;
151 u16 status;
152 u8 phy_types;
153};
154
155typedef struct _BufferDesc {
156 u32 link;
157 u32 cmdsts;
158 u32 bufptr;
159} BufferDesc;
160
161struct sis900_private {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 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);
Stephen Hemminger613573252009-08-31 19:50:58 +0000218static netdev_tx_t sis900_start_xmit(struct sk_buff *skb,
219 struct net_device *net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220static int sis900_rx(struct net_device *net_dev);
221static void sis900_finish_xmit (struct net_device *net_dev);
David Howells7d12e782006-10-05 14:55:46 +0100222static irqreturn_t sis900_interrupt(int irq, void *dev_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223static int sis900_close(struct net_device *net_dev);
224static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225static 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);
Jeff Garzik7282d492006-09-13 14:30:00 -0400235static const struct ethtool_ops sis900_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237/**
238 * sis900_get_mac_addr - Get MAC address for stand alone SiS900 model
239 * @pci_dev: the sis900 pci device
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400240 * @net_dev: the net device to get address for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 *
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 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400253 signature = (u16) read_eeprom(ioaddr, EEPROMSignature);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 if (signature == 0xffff || signature == 0x0000) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400255 printk (KERN_WARNING "%s: Error EERPOM read %x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400270 * @net_dev: the net device to get address for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 *
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);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400297 ((u8 *)(net_dev->dev_addr))[i] = inb(0x71);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 }
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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400309 * @net_dev: the net device to get address for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 *
311 * SiS635 model, set MAC Reload Bit to load Mac address from APC
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400312 * to rfdr. rfdr is accessed through rfcr. MAC address is read into
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 * @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
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400346 * @net_dev: the net device to get address for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400348 * SiS962 or SiS963 model, use EEPROM to store MAC address. And EEPROM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 * is shared by
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400350 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 * by LAN, otherwise is not. After MAC address is read from EEPROM, send
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400353 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 * 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;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 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 {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400378 udelay(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 waittime ++;
380 }
381 }
382 outl(EEDONE, ee_addr);
383 return 0;
384}
385
Stephen Hemminger09ab9e72008-11-21 17:34:32 -0800386static const struct net_device_ops sis900_netdev_ops = {
387 .ndo_open = sis900_open,
388 .ndo_stop = sis900_close,
389 .ndo_start_xmit = sis900_start_xmit,
390 .ndo_set_config = sis900_set_config,
391 .ndo_set_multicast_list = set_rx_mode,
392 .ndo_change_mtu = eth_change_mtu,
393 .ndo_validate_addr = eth_validate_addr,
Stephen Hemmingerfe96aaa2009-01-09 11:13:14 +0000394 .ndo_set_mac_address = eth_mac_addr,
Stephen Hemminger09ab9e72008-11-21 17:34:32 -0800395 .ndo_do_ioctl = mii_ioctl,
396 .ndo_tx_timeout = sis900_tx_timeout,
397#ifdef CONFIG_NET_POLL_CONTROLLER
398 .ndo_poll_controller = sis900_poll,
399#endif
400};
401
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402/**
403 * sis900_probe - Probe for sis900 device
404 * @pci_dev: the sis900 pci device
405 * @pci_id: the pci device ID
406 *
407 * Check and probe sis900 net device for @pci_dev.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400408 * Get mac address according to the chip revision,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 * and assign SiS900-specific entries in the device structure.
410 * ie: sis900_open(), sis900_start_xmit(), sis900_close(), etc.
411 */
412
413static int __devinit sis900_probe(struct pci_dev *pci_dev,
414 const struct pci_device_id *pci_id)
415{
416 struct sis900_private *sis_priv;
417 struct net_device *net_dev;
418 struct pci_dev *dev;
419 dma_addr_t ring_dma;
420 void *ring_space;
421 long ioaddr;
422 int i, ret;
Arjan van de Venf71e1302006-03-03 21:33:57 -0500423 const char *card_name = card_names[pci_id->driver_data];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 const char *dev_name = pci_name(pci_dev);
425
426/* when built into the kernel, we only print version if device is found */
427#ifndef MODULE
428 static int printed_version;
429 if (!printed_version++)
430 printk(version);
431#endif
432
433 /* setup various bits in PCI command register */
434 ret = pci_enable_device(pci_dev);
435 if(ret) return ret;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400436
Yang Hongyang284901a2009-04-06 19:01:15 -0700437 i = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if(i){
Joe Perches24500222007-11-19 17:48:28 -0800439 printk(KERN_ERR "sis900.c: architecture does not support "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 "32bit PCI busmaster DMA\n");
441 return i;
442 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 pci_set_master(pci_dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 net_dev = alloc_etherdev(sizeof(struct sis900_private));
447 if (!net_dev)
448 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 SET_NETDEV_DEV(net_dev, &pci_dev->dev);
450
451 /* We do a request_region() to register /proc/ioports info. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400452 ioaddr = pci_resource_start(pci_dev, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 ret = pci_request_regions(pci_dev, "sis900");
454 if (ret)
455 goto err_out;
456
Wang Chen8f15ea42008-11-12 23:38:36 -0800457 sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 net_dev->base_addr = ioaddr;
459 net_dev->irq = pci_dev->irq;
460 sis_priv->pci_dev = pci_dev;
461 spin_lock_init(&sis_priv->lock);
462
463 pci_set_drvdata(pci_dev, net_dev);
464
465 ring_space = pci_alloc_consistent(pci_dev, TX_TOTAL_SIZE, &ring_dma);
466 if (!ring_space) {
467 ret = -ENOMEM;
468 goto err_out_cleardev;
469 }
470 sis_priv->tx_ring = (BufferDesc *)ring_space;
471 sis_priv->tx_ring_dma = ring_dma;
472
473 ring_space = pci_alloc_consistent(pci_dev, RX_TOTAL_SIZE, &ring_dma);
474 if (!ring_space) {
475 ret = -ENOMEM;
476 goto err_unmap_tx;
477 }
478 sis_priv->rx_ring = (BufferDesc *)ring_space;
479 sis_priv->rx_ring_dma = ring_dma;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 /* The SiS900-specific entries in the device structure. */
Stephen Hemminger09ab9e72008-11-21 17:34:32 -0800482 net_dev->netdev_ops = &sis900_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 net_dev->watchdog_timeo = TX_TIMEOUT;
484 net_dev->ethtool_ops = &sis900_ethtool_ops;
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 if (sis900_debug > 0)
487 sis_priv->msg_enable = sis900_debug;
488 else
489 sis_priv->msg_enable = SIS900_DEF_MSG;
Daniele Venzanoda369b02005-05-12 20:13:14 -0400490
491 sis_priv->mii_info.dev = net_dev;
492 sis_priv->mii_info.mdio_read = mdio_read;
493 sis_priv->mii_info.mdio_write = mdio_write;
494 sis_priv->mii_info.phy_id_mask = 0x1f;
495 sis_priv->mii_info.reg_num_mask = 0x1f;
496
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 /* Get Mac address according to the chip revision */
498 pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &(sis_priv->chipset_rev));
499 if(netif_msg_probe(sis_priv))
500 printk(KERN_DEBUG "%s: detected revision %2.2x, "
501 "trying to get MAC address...\n",
502 dev_name, sis_priv->chipset_rev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 ret = 0;
505 if (sis_priv->chipset_rev == SIS630E_900_REV)
506 ret = sis630e_get_mac_addr(pci_dev, net_dev);
507 else if ((sis_priv->chipset_rev > 0x81) && (sis_priv->chipset_rev <= 0x90) )
508 ret = sis635_get_mac_addr(pci_dev, net_dev);
509 else if (sis_priv->chipset_rev == SIS96x_900_REV)
510 ret = sis96x_get_mac_addr(pci_dev, net_dev);
511 else
512 ret = sis900_get_mac_addr(pci_dev, net_dev);
513
Daniele Venzanod1d5e6b2009-01-14 20:46:24 -0800514 if (!ret || !is_valid_ether_addr(net_dev->dev_addr)) {
515 random_ether_addr(net_dev->dev_addr);
516 printk(KERN_WARNING "%s: Unreadable or invalid MAC address,"
517 "using random generated one\n", dev_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 /* 630ET : set the mii access mode as software-mode */
521 if (sis_priv->chipset_rev == SIS630ET_900_REV)
522 outl(ACCESSMODE | inl(ioaddr + cr), ioaddr + cr);
523
524 /* probe for mii transceiver */
525 if (sis900_mii_probe(net_dev) == 0) {
526 printk(KERN_WARNING "%s: Error probing MII device.\n",
527 dev_name);
528 ret = -ENODEV;
529 goto err_unmap_rx;
530 }
531
532 /* save our host bridge revision */
533 dev = pci_get_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_630, NULL);
534 if (dev) {
535 pci_read_config_byte(dev, PCI_CLASS_REVISION, &sis_priv->host_bridge_rev);
536 pci_dev_put(dev);
537 }
538
539 ret = register_netdev(net_dev);
540 if (ret)
541 goto err_unmap_rx;
542
543 /* print some information about our NIC */
Johannes Berge1749612008-10-27 15:59:26 -0700544 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, %pM\n",
Joe Perches0795af52007-10-03 17:59:30 -0700545 net_dev->name, card_name, ioaddr, net_dev->irq,
Johannes Berge1749612008-10-27 15:59:26 -0700546 net_dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Daniele Venzanoea37cce2005-10-11 09:44:30 +0200548 /* Detect Wake on Lan support */
Daniele Venzano7bef4b32006-02-25 17:01:09 -0500549 ret = (inl(net_dev->base_addr + CFGPMC) & PMESP) >> 27;
Daniele Venzanoea37cce2005-10-11 09:44:30 +0200550 if (netif_msg_probe(sis_priv) && (ret & PME_D3C) == 0)
551 printk(KERN_INFO "%s: Wake on LAN only available from suspend to RAM.", net_dev->name);
552
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 return 0;
554
555 err_unmap_rx:
556 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
557 sis_priv->rx_ring_dma);
558 err_unmap_tx:
559 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
560 sis_priv->tx_ring_dma);
561 err_out_cleardev:
562 pci_set_drvdata(pci_dev, NULL);
563 pci_release_regions(pci_dev);
564 err_out:
565 free_netdev(net_dev);
566 return ret;
567}
568
569/**
570 * sis900_mii_probe - Probe MII PHY for sis900
571 * @net_dev: the net device to probe for
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400572 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 * Search for total of 32 possible mii phy addresses.
574 * Identify and set current phy if found one,
575 * return error if it failed to found.
576 */
577
Adrian Bunk4e50a8e2007-07-10 14:44:35 +0200578static int __devinit sis900_mii_probe(struct net_device * net_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579{
Wang Chen8f15ea42008-11-12 23:38:36 -0800580 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 const char *dev_name = pci_name(sis_priv->pci_dev);
582 u16 poll_bit = MII_STAT_LINK, status = 0;
583 unsigned long timeout = jiffies + 5 * HZ;
584 int phy_addr;
585
586 sis_priv->mii = NULL;
587
588 /* search for total of 32 possible mii phy addresses */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400589 for (phy_addr = 0; phy_addr < 32; phy_addr++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 struct mii_phy * mii_phy = NULL;
591 u16 mii_status;
592 int i;
593
594 mii_phy = NULL;
595 for(i = 0; i < 2; i++)
596 mii_status = mdio_read(net_dev, phy_addr, MII_STATUS);
597
598 if (mii_status == 0xffff || mii_status == 0x0000) {
599 if (netif_msg_probe(sis_priv))
600 printk(KERN_DEBUG "%s: MII at address %d"
601 " not accessible\n",
602 dev_name, phy_addr);
603 continue;
604 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 if ((mii_phy = kmalloc(sizeof(struct mii_phy), GFP_KERNEL)) == NULL) {
607 printk(KERN_WARNING "Cannot allocate mem for struct mii_phy\n");
608 mii_phy = sis_priv->first_mii;
609 while (mii_phy) {
610 struct mii_phy *phy;
611 phy = mii_phy;
612 mii_phy = mii_phy->next;
613 kfree(phy);
614 }
615 return 0;
616 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 mii_phy->phy_id0 = mdio_read(net_dev, phy_addr, MII_PHY_ID0);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400619 mii_phy->phy_id1 = mdio_read(net_dev, phy_addr, MII_PHY_ID1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 mii_phy->phy_addr = phy_addr;
621 mii_phy->status = mii_status;
622 mii_phy->next = sis_priv->mii;
623 sis_priv->mii = mii_phy;
624 sis_priv->first_mii = mii_phy;
625
626 for (i = 0; mii_chip_table[i].phy_id1; i++)
627 if ((mii_phy->phy_id0 == mii_chip_table[i].phy_id0 ) &&
628 ((mii_phy->phy_id1 & 0xFFF0) == mii_chip_table[i].phy_id1)){
629 mii_phy->phy_types = mii_chip_table[i].phy_types;
630 if (mii_chip_table[i].phy_types == MIX)
631 mii_phy->phy_types =
632 (mii_status & (MII_STAT_CAN_TX_FDX | MII_STAT_CAN_TX)) ? LAN : HOME;
633 printk(KERN_INFO "%s: %s transceiver found "
634 "at address %d.\n",
635 dev_name,
636 mii_chip_table[i].name,
637 phy_addr);
638 break;
639 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 if( !mii_chip_table[i].phy_id1 ) {
642 printk(KERN_INFO "%s: Unknown PHY transceiver found at address %d.\n",
643 dev_name, phy_addr);
644 mii_phy->phy_types = UNKNOWN;
645 }
646 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 if (sis_priv->mii == NULL) {
649 printk(KERN_INFO "%s: No MII transceivers found!\n", dev_name);
650 return 0;
651 }
652
653 /* select default PHY for mac */
654 sis_priv->mii = NULL;
655 sis900_default_phy( net_dev );
656
657 /* Reset phy if default phy is internal sis900 */
658 if ((sis_priv->mii->phy_id0 == 0x001D) &&
659 ((sis_priv->mii->phy_id1&0xFFF0) == 0x8000))
660 status = sis900_reset_phy(net_dev, sis_priv->cur_phy);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 /* workaround for ICS1893 PHY */
663 if ((sis_priv->mii->phy_id0 == 0x0015) &&
664 ((sis_priv->mii->phy_id1&0xFFF0) == 0xF440))
665 mdio_write(net_dev, sis_priv->cur_phy, 0x0018, 0xD200);
666
667 if(status & MII_STAT_LINK){
668 while (poll_bit) {
669 yield();
670
671 poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
672 if (time_after_eq(jiffies, timeout)) {
673 printk(KERN_WARNING "%s: reset phy and link down now\n",
674 dev_name);
675 return -ETIME;
676 }
677 }
678 }
679
680 if (sis_priv->chipset_rev == SIS630E_900_REV) {
681 /* SiS 630E has some bugs on default value of PHY registers */
682 mdio_write(net_dev, sis_priv->cur_phy, MII_ANADV, 0x05e1);
683 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG1, 0x22);
684 mdio_write(net_dev, sis_priv->cur_phy, MII_CONFIG2, 0xff00);
685 mdio_write(net_dev, sis_priv->cur_phy, MII_MASK, 0xffc0);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400686 //mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, 0x1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 }
688
689 if (sis_priv->mii->status & MII_STAT_LINK)
690 netif_carrier_on(net_dev);
691 else
692 netif_carrier_off(net_dev);
693
694 return 1;
695}
696
697/**
698 * sis900_default_phy - Select default PHY for sis900 mac.
699 * @net_dev: the net device to probe for
700 *
701 * Select first detected PHY with link as default.
702 * If no one is link on, select PHY whose types is HOME as default.
703 * If HOME doesn't exist, select LAN.
704 */
705
706static u16 sis900_default_phy(struct net_device * net_dev)
707{
Wang Chen8f15ea42008-11-12 23:38:36 -0800708 struct sis900_private *sis_priv = netdev_priv(net_dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400709 struct mii_phy *phy = NULL, *phy_home = NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 *default_phy = NULL, *phy_lan = NULL;
711 u16 status;
712
713 for (phy=sis_priv->first_mii; phy; phy=phy->next) {
714 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
715 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
716
717 /* Link ON & Not select default PHY & not ghost PHY */
718 if ((status & MII_STAT_LINK) && !default_phy &&
719 (phy->phy_types != UNKNOWN))
720 default_phy = phy;
721 else {
722 status = mdio_read(net_dev, phy->phy_addr, MII_CONTROL);
723 mdio_write(net_dev, phy->phy_addr, MII_CONTROL,
724 status | MII_CNTL_AUTO | MII_CNTL_ISOLATE);
725 if (phy->phy_types == HOME)
726 phy_home = phy;
727 else if(phy->phy_types == LAN)
728 phy_lan = phy;
729 }
730 }
731
732 if (!default_phy && phy_home)
733 default_phy = phy_home;
734 else if (!default_phy && phy_lan)
735 default_phy = phy_lan;
736 else if (!default_phy)
737 default_phy = sis_priv->first_mii;
738
739 if (sis_priv->mii != default_phy) {
740 sis_priv->mii = default_phy;
741 sis_priv->cur_phy = default_phy->phy_addr;
742 printk(KERN_INFO "%s: Using transceiver found at address %d as default\n",
743 pci_name(sis_priv->pci_dev), sis_priv->cur_phy);
744 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400745
Daniele Venzanoda369b02005-05-12 20:13:14 -0400746 sis_priv->mii_info.phy_id = sis_priv->cur_phy;
747
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 status = mdio_read(net_dev, sis_priv->cur_phy, MII_CONTROL);
749 status &= (~MII_CNTL_ISOLATE);
750
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400751 mdio_write(net_dev, sis_priv->cur_phy, MII_CONTROL, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
753 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
754
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400755 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756}
757
758
759/**
760 * sis900_set_capability - set the media capability of network adapter.
761 * @net_dev : the net device to probe for
762 * @phy : default PHY
763 *
764 * Set the media capability of network adapter according to
765 * mii status register. It's necessary before auto-negotiate.
766 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400767
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768static void sis900_set_capability(struct net_device *net_dev, struct mii_phy *phy)
769{
770 u16 cap;
771 u16 status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
774 status = mdio_read(net_dev, phy->phy_addr, MII_STATUS);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 cap = MII_NWAY_CSMA_CD |
777 ((phy->status & MII_STAT_CAN_TX_FDX)? MII_NWAY_TX_FDX:0) |
778 ((phy->status & MII_STAT_CAN_TX) ? MII_NWAY_TX:0) |
779 ((phy->status & MII_STAT_CAN_T_FDX) ? MII_NWAY_T_FDX:0)|
780 ((phy->status & MII_STAT_CAN_T) ? MII_NWAY_T:0);
781
782 mdio_write(net_dev, phy->phy_addr, MII_ANADV, cap);
783}
784
785
786/* Delay between EEPROM clock transitions. */
787#define eeprom_delay() inl(ee_addr)
788
789/**
790 * read_eeprom - Read Serial EEPROM
791 * @ioaddr: base i/o address
792 * @location: the EEPROM location to read
793 *
794 * Read Serial EEPROM through EEPROM Access Register.
795 * Note that location is in word (16 bits) unit
796 */
797
798static u16 __devinit read_eeprom(long ioaddr, int location)
799{
800 int i;
801 u16 retval = 0;
802 long ee_addr = ioaddr + mear;
803 u32 read_cmd = location | EEread;
804
805 outl(0, ee_addr);
806 eeprom_delay();
807 outl(EECS, ee_addr);
808 eeprom_delay();
809
810 /* Shift the read command (9) bits out. */
811 for (i = 8; i >= 0; i--) {
812 u32 dataval = (read_cmd & (1 << i)) ? EEDI | EECS : EECS;
813 outl(dataval, ee_addr);
814 eeprom_delay();
815 outl(dataval | EECLK, ee_addr);
816 eeprom_delay();
817 }
818 outl(EECS, ee_addr);
819 eeprom_delay();
820
821 /* read the 16-bits data in */
822 for (i = 16; i > 0; i--) {
823 outl(EECS, ee_addr);
824 eeprom_delay();
825 outl(EECS | EECLK, ee_addr);
826 eeprom_delay();
827 retval = (retval << 1) | ((inl(ee_addr) & EEDO) ? 1 : 0);
828 eeprom_delay();
829 }
830
831 /* Terminate the EEPROM access. */
832 outl(0, ee_addr);
833 eeprom_delay();
834
835 return (retval);
836}
837
838/* Read and write the MII management registers using software-generated
839 serial MDIO protocol. Note that the command bits and data bits are
840 send out separately */
841#define mdio_delay() inl(mdio_addr)
842
843static void mdio_idle(long mdio_addr)
844{
845 outl(MDIO | MDDIR, mdio_addr);
846 mdio_delay();
847 outl(MDIO | MDDIR | MDC, mdio_addr);
848}
849
850/* Syncronize the MII management interface by shifting 32 one bits out. */
851static void mdio_reset(long mdio_addr)
852{
853 int i;
854
855 for (i = 31; i >= 0; i--) {
856 outl(MDDIR | MDIO, mdio_addr);
857 mdio_delay();
858 outl(MDDIR | MDIO | MDC, mdio_addr);
859 mdio_delay();
860 }
861 return;
862}
863
864/**
865 * mdio_read - read MII PHY register
866 * @net_dev: the net device to read
867 * @phy_id: the phy address to read
868 * @location: the phy regiester id to read
869 *
870 * Read MII registers through MDIO and MDC
871 * using MDIO management frame structure and protocol(defined by ISO/IEC).
872 * Please see SiS7014 or ICS spec
873 */
874
Daniele Venzanoda369b02005-05-12 20:13:14 -0400875static int mdio_read(struct net_device *net_dev, int phy_id, int location)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876{
877 long mdio_addr = net_dev->base_addr + mear;
878 int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
879 u16 retval = 0;
880 int i;
881
882 mdio_reset(mdio_addr);
883 mdio_idle(mdio_addr);
884
885 for (i = 15; i >= 0; i--) {
886 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
887 outl(dataval, mdio_addr);
888 mdio_delay();
889 outl(dataval | MDC, mdio_addr);
890 mdio_delay();
891 }
892
893 /* Read the 16 data bits. */
894 for (i = 16; i > 0; i--) {
895 outl(0, mdio_addr);
896 mdio_delay();
897 retval = (retval << 1) | ((inl(mdio_addr) & MDIO) ? 1 : 0);
898 outl(MDC, mdio_addr);
899 mdio_delay();
900 }
901 outl(0x00, mdio_addr);
902
903 return retval;
904}
905
906/**
907 * mdio_write - write MII PHY register
908 * @net_dev: the net device to write
909 * @phy_id: the phy address to write
910 * @location: the phy regiester id to write
911 * @value: the register value to write with
912 *
913 * Write MII registers with @value through MDIO and MDC
914 * using MDIO management frame structure and protocol(defined by ISO/IEC)
915 * please see SiS7014 or ICS spec
916 */
917
918static void mdio_write(struct net_device *net_dev, int phy_id, int location,
919 int value)
920{
921 long mdio_addr = net_dev->base_addr + mear;
922 int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
923 int i;
924
925 mdio_reset(mdio_addr);
926 mdio_idle(mdio_addr);
927
928 /* Shift the command bits out. */
929 for (i = 15; i >= 0; i--) {
930 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
931 outb(dataval, mdio_addr);
932 mdio_delay();
933 outb(dataval | MDC, mdio_addr);
934 mdio_delay();
935 }
936 mdio_delay();
937
938 /* Shift the value bits out. */
939 for (i = 15; i >= 0; i--) {
940 int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
941 outl(dataval, mdio_addr);
942 mdio_delay();
943 outl(dataval | MDC, mdio_addr);
944 mdio_delay();
945 }
946 mdio_delay();
947
948 /* Clear out extra bits. */
949 for (i = 2; i > 0; i--) {
950 outb(0, mdio_addr);
951 mdio_delay();
952 outb(MDC, mdio_addr);
953 mdio_delay();
954 }
955 outl(0x00, mdio_addr);
956
957 return;
958}
959
960
961/**
962 * sis900_reset_phy - reset sis900 mii phy.
963 * @net_dev: the net device to write
964 * @phy_addr: default phy address
965 *
966 * Some specific phy can't work properly without reset.
967 * This function will be called during initialization and
968 * link status change from ON to DOWN.
969 */
970
971static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
972{
Andrew Mortonf3be9742007-03-06 02:41:55 -0800973 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 u16 status;
975
Andrew Mortonf3be9742007-03-06 02:41:55 -0800976 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 status = mdio_read(net_dev, phy_addr, MII_STATUS);
978
979 mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400980
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 return status;
982}
983
984#ifdef CONFIG_NET_POLL_CONTROLLER
985/*
986 * Polling 'interrupt' - used by things like netconsole to send skbs
987 * without having to re-enable interrupts. It's not called while
988 * the interrupt routine is executing.
989*/
990static void sis900_poll(struct net_device *dev)
991{
992 disable_irq(dev->irq);
David Howells7d12e782006-10-05 14:55:46 +0100993 sis900_interrupt(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 enable_irq(dev->irq);
995}
996#endif
997
998/**
999 * sis900_open - open sis900 device
1000 * @net_dev: the net device to open
1001 *
1002 * Do some initialization and start net interface.
1003 * enable interrupts and set sis900 timer.
1004 */
1005
1006static int
1007sis900_open(struct net_device *net_dev)
1008{
Wang Chen8f15ea42008-11-12 23:38:36 -08001009 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 long ioaddr = net_dev->base_addr;
1011 int ret;
1012
1013 /* Soft reset the chip. */
1014 sis900_reset(net_dev);
1015
1016 /* Equalizer workaround Rule */
1017 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1018
Joe Perchesa0607fd2009-11-18 23:29:17 -08001019 ret = request_irq(net_dev->irq, sis900_interrupt, IRQF_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 net_dev->name, net_dev);
1021 if (ret)
1022 return ret;
1023
1024 sis900_init_rxfilter(net_dev);
1025
1026 sis900_init_tx_ring(net_dev);
1027 sis900_init_rx_ring(net_dev);
1028
1029 set_rx_mode(net_dev);
1030
1031 netif_start_queue(net_dev);
1032
1033 /* Workaround for EDB */
1034 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
1035
1036 /* Enable all known interrupts by setting the interrupt mask. */
1037 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1038 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
1039 outl(IE, ioaddr + ier);
1040
1041 sis900_check_mode(net_dev, sis_priv->mii);
1042
1043 /* Set the timer to switch to check for link beat and perhaps switch
1044 to an alternate media type. */
1045 init_timer(&sis_priv->timer);
1046 sis_priv->timer.expires = jiffies + HZ;
1047 sis_priv->timer.data = (unsigned long)net_dev;
1048 sis_priv->timer.function = &sis900_timer;
1049 add_timer(&sis_priv->timer);
1050
1051 return 0;
1052}
1053
1054/**
1055 * sis900_init_rxfilter - Initialize the Rx filter
1056 * @net_dev: the net device to initialize for
1057 *
1058 * Set receive filter address to our MAC address
1059 * and enable packet filtering.
1060 */
1061
1062static void
1063sis900_init_rxfilter (struct net_device * net_dev)
1064{
Wang Chen8f15ea42008-11-12 23:38:36 -08001065 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 long ioaddr = net_dev->base_addr;
1067 u32 rfcrSave;
1068 u32 i;
1069
1070 rfcrSave = inl(rfcr + ioaddr);
1071
1072 /* disable packet filtering before setting filter */
1073 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
1074
1075 /* load MAC addr to filter data register */
1076 for (i = 0 ; i < 3 ; i++) {
1077 u32 w;
1078
1079 w = (u32) *((u16 *)(net_dev->dev_addr)+i);
1080 outl((i << RFADDR_shift), ioaddr + rfcr);
1081 outl(w, ioaddr + rfdr);
1082
1083 if (netif_msg_hw(sis_priv)) {
1084 printk(KERN_DEBUG "%s: Receive Filter Addrss[%d]=%x\n",
1085 net_dev->name, i, inl(ioaddr + rfdr));
1086 }
1087 }
1088
1089 /* enable packet filtering */
1090 outl(rfcrSave | RFEN, rfcr + ioaddr);
1091}
1092
1093/**
1094 * sis900_init_tx_ring - Initialize the Tx descriptor ring
1095 * @net_dev: the net device to initialize for
1096 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001097 * Initialize the Tx descriptor ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 */
1099
1100static void
1101sis900_init_tx_ring(struct net_device *net_dev)
1102{
Wang Chen8f15ea42008-11-12 23:38:36 -08001103 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 long ioaddr = net_dev->base_addr;
1105 int i;
1106
1107 sis_priv->tx_full = 0;
1108 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1109
1110 for (i = 0; i < NUM_TX_DESC; i++) {
1111 sis_priv->tx_skbuff[i] = NULL;
1112
1113 sis_priv->tx_ring[i].link = sis_priv->tx_ring_dma +
1114 ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
1115 sis_priv->tx_ring[i].cmdsts = 0;
1116 sis_priv->tx_ring[i].bufptr = 0;
1117 }
1118
1119 /* load Transmit Descriptor Register */
1120 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1121 if (netif_msg_hw(sis_priv))
1122 printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
1123 net_dev->name, inl(ioaddr + txdp));
1124}
1125
1126/**
1127 * sis900_init_rx_ring - Initialize the Rx descriptor ring
1128 * @net_dev: the net device to initialize for
1129 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001130 * Initialize the Rx descriptor ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 * and pre-allocate recevie buffers (socket buffer)
1132 */
1133
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001134static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135sis900_init_rx_ring(struct net_device *net_dev)
1136{
Wang Chen8f15ea42008-11-12 23:38:36 -08001137 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 long ioaddr = net_dev->base_addr;
1139 int i;
1140
1141 sis_priv->cur_rx = 0;
1142 sis_priv->dirty_rx = 0;
1143
1144 /* init RX descriptor */
1145 for (i = 0; i < NUM_RX_DESC; i++) {
1146 sis_priv->rx_skbuff[i] = NULL;
1147
1148 sis_priv->rx_ring[i].link = sis_priv->rx_ring_dma +
1149 ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
1150 sis_priv->rx_ring[i].cmdsts = 0;
1151 sis_priv->rx_ring[i].bufptr = 0;
1152 }
1153
1154 /* allocate sock buffers */
1155 for (i = 0; i < NUM_RX_DESC; i++) {
1156 struct sk_buff *skb;
1157
1158 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1159 /* not enough memory for skbuff, this makes a "hole"
1160 on the buffer ring, it is not clear how the
1161 hardware will react to this kind of degenerated
1162 buffer */
1163 break;
1164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 sis_priv->rx_skbuff[i] = skb;
1166 sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
1167 sis_priv->rx_ring[i].bufptr = pci_map_single(sis_priv->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001168 skb->data, RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 }
1170 sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
1171
1172 /* load Receive Descriptor Register */
1173 outl(sis_priv->rx_ring_dma, ioaddr + rxdp);
1174 if (netif_msg_hw(sis_priv))
1175 printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
1176 net_dev->name, inl(ioaddr + rxdp));
1177}
1178
1179/**
1180 * sis630_set_eq - set phy equalizer value for 630 LAN
1181 * @net_dev: the net device to set equalizer value
1182 * @revision: 630 LAN revision number
1183 *
1184 * 630E equalizer workaround rule(Cyrus Huang 08/15)
1185 * PHY register 14h(Test)
1186 * Bit 14: 0 -- Automatically dectect (default)
1187 * 1 -- Manually set Equalizer filter
1188 * Bit 13: 0 -- (Default)
1189 * 1 -- Speed up convergence of equalizer setting
1190 * Bit 9 : 0 -- (Default)
1191 * 1 -- Disable Baseline Wander
1192 * Bit 3~7 -- Equalizer filter setting
1193 * Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
1194 * Then calculate equalizer value
1195 * Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
1196 * Link Off:Set Bit 13 to 1, Bit 14 to 0
1197 * Calculate Equalizer value:
1198 * When Link is ON and Bit 14 is 0, SIS900PHY will auto-dectect proper equalizer value.
1199 * When the equalizer is stable, this value is not a fixed value. It will be within
1200 * a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
1201 * 0 <= max <= 4 --> set equalizer to max
1202 * 5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
1203 * max >= 15 --> set equalizer to max+5 or set equalizer to max+6 if max == min
1204 */
1205
1206static void sis630_set_eq(struct net_device *net_dev, u8 revision)
1207{
Wang Chen8f15ea42008-11-12 23:38:36 -08001208 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 u16 reg14h, eq_value=0, max_value=0, min_value=0;
1210 int i, maxcount=10;
1211
1212 if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1213 revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
1214 return;
1215
1216 if (netif_carrier_ok(net_dev)) {
1217 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1218 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1219 (0x2200 | reg14h) & 0xBFFF);
1220 for (i=0; i < maxcount; i++) {
1221 eq_value = (0x00F8 & mdio_read(net_dev,
1222 sis_priv->cur_phy, MII_RESV)) >> 3;
1223 if (i == 0)
1224 max_value=min_value=eq_value;
1225 max_value = (eq_value > max_value) ?
1226 eq_value : max_value;
1227 min_value = (eq_value < min_value) ?
1228 eq_value : min_value;
1229 }
1230 /* 630E rule to determine the equalizer value */
1231 if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1232 revision == SIS630ET_900_REV) {
1233 if (max_value < 5)
1234 eq_value = max_value;
1235 else if (max_value >= 5 && max_value < 15)
1236 eq_value = (max_value == min_value) ?
1237 max_value+2 : max_value+1;
1238 else if (max_value >= 15)
1239 eq_value=(max_value == min_value) ?
1240 max_value+6 : max_value+5;
1241 }
1242 /* 630B0&B1 rule to determine the equalizer value */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001243 if (revision == SIS630A_900_REV &&
1244 (sis_priv->host_bridge_rev == SIS630B0 ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 sis_priv->host_bridge_rev == SIS630B1)) {
1246 if (max_value == 0)
1247 eq_value = 3;
1248 else
1249 eq_value = (max_value + min_value + 1)/2;
1250 }
1251 /* write equalizer value and setting */
1252 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1253 reg14h = (reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
1254 reg14h = (reg14h | 0x6000) & 0xFDFF;
1255 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
1256 } else {
1257 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001258 if (revision == SIS630A_900_REV &&
1259 (sis_priv->host_bridge_rev == SIS630B0 ||
1260 sis_priv->host_bridge_rev == SIS630B1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1262 (reg14h | 0x2200) & 0xBFFF);
1263 else
1264 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1265 (reg14h | 0x2000) & 0xBFFF);
1266 }
1267 return;
1268}
1269
1270/**
1271 * sis900_timer - sis900 timer routine
1272 * @data: pointer to sis900 net device
1273 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001274 * On each timer ticks we check two things,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 * link status (ON/OFF) and link mode (10/100/Full/Half)
1276 */
1277
1278static void sis900_timer(unsigned long data)
1279{
1280 struct net_device *net_dev = (struct net_device *)data;
Wang Chen8f15ea42008-11-12 23:38:36 -08001281 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 struct mii_phy *mii_phy = sis_priv->mii;
Arjan van de Venf71e1302006-03-03 21:33:57 -05001283 static const int next_tick = 5*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 u16 status;
1285
1286 if (!sis_priv->autong_complete){
Ingo Molnaref0cd872008-11-25 16:52:13 -08001287 int uninitialized_var(speed), duplex = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289 sis900_read_mode(net_dev, &speed, &duplex);
1290 if (duplex){
1291 sis900_set_mode(net_dev->base_addr, speed, duplex);
1292 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1293 netif_start_queue(net_dev);
1294 }
1295
1296 sis_priv->timer.expires = jiffies + HZ;
1297 add_timer(&sis_priv->timer);
1298 return;
1299 }
1300
1301 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1302 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1303
1304 /* Link OFF -> ON */
1305 if (!netif_carrier_ok(net_dev)) {
1306 LookForLink:
1307 /* Search for new PHY */
1308 status = sis900_default_phy(net_dev);
1309 mii_phy = sis_priv->mii;
1310
1311 if (status & MII_STAT_LINK){
1312 sis900_check_mode(net_dev, mii_phy);
1313 netif_carrier_on(net_dev);
1314 }
1315 } else {
1316 /* Link ON -> OFF */
1317 if (!(status & MII_STAT_LINK)){
1318 netif_carrier_off(net_dev);
1319 if(netif_msg_link(sis_priv))
1320 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1321
1322 /* Change mode issue */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001323 if ((mii_phy->phy_id0 == 0x001D) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 ((mii_phy->phy_id1 & 0xFFF0) == 0x8000))
1325 sis900_reset_phy(net_dev, sis_priv->cur_phy);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001326
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 sis630_set_eq(net_dev, sis_priv->chipset_rev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 goto LookForLink;
1330 }
1331 }
1332
1333 sis_priv->timer.expires = jiffies + next_tick;
1334 add_timer(&sis_priv->timer);
1335}
1336
1337/**
1338 * sis900_check_mode - check the media mode for sis900
1339 * @net_dev: the net device to be checked
1340 * @mii_phy: the mii phy
1341 *
1342 * Older driver gets the media mode from mii status output
1343 * register. Now we set our media capability and auto-negotiate
1344 * to get the upper bound of speed and duplex between two ends.
1345 * If the types of mii phy is HOME, it doesn't need to auto-negotiate
1346 * and autong_complete should be set to 1.
1347 */
1348
1349static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
1350{
Wang Chen8f15ea42008-11-12 23:38:36 -08001351 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 long ioaddr = net_dev->base_addr;
1353 int speed, duplex;
1354
1355 if (mii_phy->phy_types == LAN) {
1356 outl(~EXD & inl(ioaddr + cfg), ioaddr + cfg);
1357 sis900_set_capability(net_dev , mii_phy);
1358 sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
1359 } else {
1360 outl(EXD | inl(ioaddr + cfg), ioaddr + cfg);
1361 speed = HW_SPEED_HOME;
1362 duplex = FDX_CAPABLE_HALF_SELECTED;
1363 sis900_set_mode(ioaddr, speed, duplex);
1364 sis_priv->autong_complete = 1;
1365 }
1366}
1367
1368/**
1369 * sis900_set_mode - Set the media mode of mac register.
1370 * @ioaddr: the address of the device
1371 * @speed : the transmit speed to be determined
1372 * @duplex: the duplex mode to be determined
1373 *
1374 * Set the media mode of mac register txcfg/rxcfg according to
1375 * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
1376 * bus is used instead of PCI bus. When this bit is set 1, the
1377 * Max DMA Burst Size for TX/RX DMA should be no larger than 16
1378 * double words.
1379 */
1380
1381static void sis900_set_mode (long ioaddr, int speed, int duplex)
1382{
1383 u32 tx_flags = 0, rx_flags = 0;
1384
1385 if (inl(ioaddr + cfg) & EDB_MASTER_EN) {
1386 tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) |
1387 (TX_FILL_THRESH << TxFILLT_shift);
1388 rx_flags = DMA_BURST_64 << RxMXDMA_shift;
1389 } else {
1390 tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) |
1391 (TX_FILL_THRESH << TxFILLT_shift);
1392 rx_flags = DMA_BURST_512 << RxMXDMA_shift;
1393 }
1394
1395 if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS) {
1396 rx_flags |= (RxDRNT_10 << RxDRNT_shift);
1397 tx_flags |= (TxDRNT_10 << TxDRNT_shift);
1398 } else {
1399 rx_flags |= (RxDRNT_100 << RxDRNT_shift);
1400 tx_flags |= (TxDRNT_100 << TxDRNT_shift);
1401 }
1402
1403 if (duplex == FDX_CAPABLE_FULL_SELECTED) {
1404 tx_flags |= (TxCSI | TxHBI);
1405 rx_flags |= RxATX;
1406 }
1407
Daniele Venzanod269a692006-04-17 10:28:06 +02001408#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1409 /* Can accept Jumbo packet */
1410 rx_flags |= RxAJAB;
1411#endif
1412
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 outl (tx_flags, ioaddr + txcfg);
1414 outl (rx_flags, ioaddr + rxcfg);
1415}
1416
1417/**
1418 * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
1419 * @net_dev: the net device to read mode for
1420 * @phy_addr: mii phy address
1421 *
1422 * If the adapter is link-on, set the auto-negotiate enable/reset bit.
1423 * autong_complete should be set to 0 when starting auto-negotiation.
1424 * autong_complete should be set to 1 if we didn't start auto-negotiation.
1425 * sis900_timer will wait for link on again if autong_complete = 0.
1426 */
1427
1428static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
1429{
Wang Chen8f15ea42008-11-12 23:38:36 -08001430 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 int i = 0;
1432 u32 status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001433
Andrew Mortonf3be9742007-03-06 02:41:55 -08001434 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1436
1437 if (!(status & MII_STAT_LINK)){
1438 if(netif_msg_link(sis_priv))
1439 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1440 sis_priv->autong_complete = 1;
1441 netif_carrier_off(net_dev);
1442 return;
1443 }
1444
1445 /* (Re)start AutoNegotiate */
1446 mdio_write(net_dev, phy_addr, MII_CONTROL,
1447 MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
1448 sis_priv->autong_complete = 0;
1449}
1450
1451
1452/**
1453 * sis900_read_mode - read media mode for sis900 internal phy
1454 * @net_dev: the net device to read mode for
1455 * @speed : the transmit speed to be determined
1456 * @duplex : the duplex mode to be determined
1457 *
1458 * The capability of remote end will be put in mii register autorec
1459 * after auto-negotiation. Use AND operation to get the upper bound
1460 * of speed and duplex between two ends.
1461 */
1462
1463static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
1464{
Wang Chen8f15ea42008-11-12 23:38:36 -08001465 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 struct mii_phy *phy = sis_priv->mii;
1467 int phy_addr = sis_priv->cur_phy;
1468 u32 status;
1469 u16 autoadv, autorec;
Andrew Mortonf3be9742007-03-06 02:41:55 -08001470 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Andrew Mortonf3be9742007-03-06 02:41:55 -08001472 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1474
1475 if (!(status & MII_STAT_LINK))
1476 return;
1477
1478 /* AutoNegotiate completed */
1479 autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
1480 autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
1481 status = autoadv & autorec;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001482
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 *speed = HW_SPEED_10_MBPS;
1484 *duplex = FDX_CAPABLE_HALF_SELECTED;
1485
1486 if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
1487 *speed = HW_SPEED_100_MBPS;
1488 if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
1489 *duplex = FDX_CAPABLE_FULL_SELECTED;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001490
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 sis_priv->autong_complete = 1;
1492
1493 /* Workaround for Realtek RTL8201 PHY issue */
1494 if ((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)) {
1495 if (mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
1496 *duplex = FDX_CAPABLE_FULL_SELECTED;
1497 if (mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
1498 *speed = HW_SPEED_100_MBPS;
1499 }
1500
1501 if(netif_msg_link(sis_priv))
Frans Pop2381a552010-03-24 07:57:36 +00001502 printk(KERN_INFO "%s: Media Link On %s %s-duplex\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 net_dev->name,
1504 *speed == HW_SPEED_100_MBPS ?
1505 "100mbps" : "10mbps",
1506 *duplex == FDX_CAPABLE_FULL_SELECTED ?
1507 "full" : "half");
1508}
1509
1510/**
1511 * sis900_tx_timeout - sis900 transmit timeout routine
1512 * @net_dev: the net device to transmit
1513 *
1514 * print transmit timeout status
1515 * disable interrupts and do some tasks
1516 */
1517
1518static void sis900_tx_timeout(struct net_device *net_dev)
1519{
Wang Chen8f15ea42008-11-12 23:38:36 -08001520 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 long ioaddr = net_dev->base_addr;
1522 unsigned long flags;
1523 int i;
1524
1525 if(netif_msg_tx_err(sis_priv))
Frans Pop2381a552010-03-24 07:57:36 +00001526 printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 net_dev->name, inl(ioaddr + cr), inl(ioaddr + isr));
1528
1529 /* Disable interrupts by clearing the interrupt mask. */
1530 outl(0x0000, ioaddr + imr);
1531
1532 /* use spinlock to prevent interrupt handler accessing buffer ring */
1533 spin_lock_irqsave(&sis_priv->lock, flags);
1534
1535 /* discard unsent packets */
1536 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1537 for (i = 0; i < NUM_TX_DESC; i++) {
1538 struct sk_buff *skb = sis_priv->tx_skbuff[i];
1539
1540 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001541 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 sis_priv->tx_ring[i].bufptr, skb->len,
1543 PCI_DMA_TODEVICE);
1544 dev_kfree_skb_irq(skb);
1545 sis_priv->tx_skbuff[i] = NULL;
1546 sis_priv->tx_ring[i].cmdsts = 0;
1547 sis_priv->tx_ring[i].bufptr = 0;
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001548 net_dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 }
1550 }
1551 sis_priv->tx_full = 0;
1552 netif_wake_queue(net_dev);
1553
1554 spin_unlock_irqrestore(&sis_priv->lock, flags);
1555
1556 net_dev->trans_start = jiffies;
1557
1558 /* load Transmit Descriptor Register */
1559 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1560
1561 /* Enable all known interrupts by setting the interrupt mask. */
1562 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1563 return;
1564}
1565
1566/**
1567 * sis900_start_xmit - sis900 start transmit routine
1568 * @skb: socket buffer pointer to put the data being transmitted
1569 * @net_dev: the net device to transmit with
1570 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001571 * Set the transmit buffer descriptor,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 * and write TxENA to enable transmit state machine.
1573 * tell upper layer if the buffer is full
1574 */
1575
Stephen Hemminger613573252009-08-31 19:50:58 +00001576static netdev_tx_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
1578{
Wang Chen8f15ea42008-11-12 23:38:36 -08001579 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 long ioaddr = net_dev->base_addr;
1581 unsigned int entry;
1582 unsigned long flags;
1583 unsigned int index_cur_tx, index_dirty_tx;
1584 unsigned int count_dirty_tx;
1585
1586 /* Don't transmit data before the complete of auto-negotiation */
1587 if(!sis_priv->autong_complete){
1588 netif_stop_queue(net_dev);
Patrick McHardy5b548142009-06-12 06:22:29 +00001589 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 }
1591
1592 spin_lock_irqsave(&sis_priv->lock, flags);
1593
1594 /* Calculate the next Tx descriptor entry. */
1595 entry = sis_priv->cur_tx % NUM_TX_DESC;
1596 sis_priv->tx_skbuff[entry] = skb;
1597
1598 /* set the transmit buffer descriptor and enable Transmit State Machine */
1599 sis_priv->tx_ring[entry].bufptr = pci_map_single(sis_priv->pci_dev,
1600 skb->data, skb->len, PCI_DMA_TODEVICE);
1601 sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
1602 outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
1603
1604 sis_priv->cur_tx ++;
1605 index_cur_tx = sis_priv->cur_tx;
1606 index_dirty_tx = sis_priv->dirty_tx;
1607
1608 for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
1609 count_dirty_tx ++;
1610
1611 if (index_cur_tx == index_dirty_tx) {
1612 /* dirty_tx is met in the cycle of cur_tx, buffer full */
1613 sis_priv->tx_full = 1;
1614 netif_stop_queue(net_dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001615 } else if (count_dirty_tx < NUM_TX_DESC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 /* Typical path, tell upper layer that more transmission is possible */
1617 netif_start_queue(net_dev);
1618 } else {
1619 /* buffer full, tell upper layer no more transmission */
1620 sis_priv->tx_full = 1;
1621 netif_stop_queue(net_dev);
1622 }
1623
1624 spin_unlock_irqrestore(&sis_priv->lock, flags);
1625
1626 net_dev->trans_start = jiffies;
1627
1628 if (netif_msg_tx_queued(sis_priv))
1629 printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
1630 "to slot %d.\n",
1631 net_dev->name, skb->data, (int)skb->len, entry);
1632
Patrick McHardy6ed10652009-06-23 06:03:08 +00001633 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634}
1635
1636/**
1637 * sis900_interrupt - sis900 interrupt handler
1638 * @irq: the irq number
1639 * @dev_instance: the client data object
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001641 * The interrupt handler does all of the Rx thread work,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 * and cleans up after the Tx thread
1643 */
1644
David Howells7d12e782006-10-05 14:55:46 +01001645static irqreturn_t sis900_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646{
1647 struct net_device *net_dev = dev_instance;
Wang Chen8f15ea42008-11-12 23:38:36 -08001648 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 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))
Joe Perches24500222007-11-19 17:48:28 -08001676 printk(KERN_INFO "%s: Abnormal interrupt, "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 "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));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001693
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 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 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001702 * Process receive interrupt events,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 * 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{
Wang Chen8f15ea42008-11-12 23:38:36 -08001710 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 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);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001744 net_dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 if (rx_status & OVERRUN)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001746 net_dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 if (rx_status & (TOOLONG|RUNT))
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001748 net_dev->stats.rx_length_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001749 if (rx_status & (RXISERR | FAERR))
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001750 net_dev->stats.rx_frame_errors++;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001751 if (rx_status & CRCERR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001752 net_dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 /* reset buffer descriptor state */
1754 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1755 } else {
1756 struct sk_buff * skb;
Neil Hormandc5a1442007-04-26 13:47:36 -04001757 struct sk_buff * rx_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Neil Hormanb748d9e2007-04-20 09:54:58 -04001759 pci_unmap_single(sis_priv->pci_dev,
1760 sis_priv->rx_ring[entry].bufptr, RX_BUF_SIZE,
1761 PCI_DMA_FROMDEVICE);
1762
André Goddard Rosaaf901ca2009-11-14 13:09:05 -02001763 /* refill the Rx buffer, what if there is not enough
Neil Hormanb748d9e2007-04-20 09:54:58 -04001764 * memory for new socket buffer ?? */
1765 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1766 /*
1767 * Not enough memory to refill the buffer
1768 * so we need to recycle the old one so
1769 * as to avoid creating a memory hole
1770 * in the rx ring
1771 */
1772 skb = sis_priv->rx_skbuff[entry];
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001773 net_dev->stats.rx_dropped++;
Neil Hormanb748d9e2007-04-20 09:54:58 -04001774 goto refill_rx_ring;
Jeff Garzik7d2e3cb2008-05-13 01:41:58 -04001775 }
Neil Hormanb748d9e2007-04-20 09:54:58 -04001776
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 /* This situation should never happen, but due to
André Goddard Rosaaf901ca2009-11-14 13:09:05 -02001778 some unknown bugs, it is possible that
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 we are working on NULL sk_buff :-( */
1780 if (sis_priv->rx_skbuff[entry] == NULL) {
1781 if (netif_msg_rx_err(sis_priv))
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001782 printk(KERN_WARNING "%s: NULL pointer "
Vasily Averin7380a78a2005-10-28 16:46:35 -04001783 "encountered in Rx ring\n"
1784 "cur_rx:%4.4d, dirty_rx:%4.4d\n",
1785 net_dev->name, sis_priv->cur_rx,
1786 sis_priv->dirty_rx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 break;
1788 }
1789
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 /* give the socket buffer to upper layers */
Neil Hormandc5a1442007-04-26 13:47:36 -04001791 rx_skb = sis_priv->rx_skbuff[entry];
1792 skb_put(rx_skb, rx_size);
1793 rx_skb->protocol = eth_type_trans(rx_skb, net_dev);
1794 netif_rx(rx_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796 /* some network statistics */
1797 if ((rx_status & BCAST) == MCAST)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001798 net_dev->stats.multicast++;
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001799 net_dev->stats.rx_bytes += rx_size;
1800 net_dev->stats.rx_packets++;
Neil Hormanb748d9e2007-04-20 09:54:58 -04001801 sis_priv->dirty_rx++;
1802refill_rx_ring:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 sis_priv->rx_skbuff[entry] = skb;
1804 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001805 sis_priv->rx_ring[entry].bufptr =
1806 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 }
1809 sis_priv->cur_rx++;
1810 entry = sis_priv->cur_rx % NUM_RX_DESC;
1811 rx_status = sis_priv->rx_ring[entry].cmdsts;
1812 } // while
1813
1814 /* refill the Rx buffer, what if the rate of refilling is slower
1815 * than consuming ?? */
Vasily Averin7380a78a2005-10-28 16:46:35 -04001816 for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 struct sk_buff *skb;
1818
1819 entry = sis_priv->dirty_rx % NUM_RX_DESC;
1820
1821 if (sis_priv->rx_skbuff[entry] == NULL) {
1822 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1823 /* not enough memory for skbuff, this makes a
1824 * "hole" on the buffer ring, it is not clear
1825 * how the hardware will react to this kind
1826 * of degenerated buffer */
1827 if (netif_msg_rx_err(sis_priv))
Joe Perches24500222007-11-19 17:48:28 -08001828 printk(KERN_INFO "%s: Memory squeeze, "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 "deferring packet.\n",
1830 net_dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001831 net_dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 break;
1833 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 sis_priv->rx_skbuff[entry] = skb;
1835 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1836 sis_priv->rx_ring[entry].bufptr =
David S. Miller689be432005-06-28 15:25:31 -07001837 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1839 }
1840 }
1841 /* re-enable the potentially idle receive state matchine */
1842 outl(RxENA | inl(ioaddr + cr), ioaddr + cr );
1843
1844 return 0;
1845}
1846
1847/**
1848 * sis900_finish_xmit - finish up transmission of packets
1849 * @net_dev: the net device to be transmitted on
1850 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001851 * Check for error condition and free socket buffer etc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 * schedule for more transmission as needed
Akinobu Mita0b280022006-03-26 01:38:58 -08001853 * Note: This function is called by interrupt handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 * don't do "too much" work here
1855 */
1856
1857static void sis900_finish_xmit (struct net_device *net_dev)
1858{
Wang Chen8f15ea42008-11-12 23:38:36 -08001859 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860
1861 for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
1862 struct sk_buff *skb;
1863 unsigned int entry;
1864 u32 tx_status;
1865
1866 entry = sis_priv->dirty_tx % NUM_TX_DESC;
1867 tx_status = sis_priv->tx_ring[entry].cmdsts;
1868
1869 if (tx_status & OWN) {
1870 /* The packet is not transmitted yet (owned by hardware) !
1871 * Note: the interrupt is generated only when Tx Machine
1872 * is idle, so this is an almost impossible case */
1873 break;
1874 }
1875
1876 if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
1877 /* packet unsuccessfully transmitted */
1878 if (netif_msg_tx_err(sis_priv))
1879 printk(KERN_DEBUG "%s: Transmit "
1880 "error, Tx status %8.8x.\n",
1881 net_dev->name, tx_status);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001882 net_dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 if (tx_status & UNDERRUN)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001884 net_dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 if (tx_status & ABORT)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001886 net_dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 if (tx_status & NOCARRIER)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001888 net_dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 if (tx_status & OWCOLL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001890 net_dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 } else {
1892 /* packet successfully transmitted */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001893 net_dev->stats.collisions += (tx_status & COLCNT) >> 16;
1894 net_dev->stats.tx_bytes += tx_status & DSIZE;
1895 net_dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 }
1897 /* Free the original skb. */
1898 skb = sis_priv->tx_skbuff[entry];
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001899 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 sis_priv->tx_ring[entry].bufptr, skb->len,
1901 PCI_DMA_TODEVICE);
1902 dev_kfree_skb_irq(skb);
1903 sis_priv->tx_skbuff[entry] = NULL;
1904 sis_priv->tx_ring[entry].bufptr = 0;
1905 sis_priv->tx_ring[entry].cmdsts = 0;
1906 }
1907
1908 if (sis_priv->tx_full && netif_queue_stopped(net_dev) &&
1909 sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
1910 /* The ring is no longer full, clear tx_full and schedule
1911 * more transmission by netif_wake_queue(net_dev) */
1912 sis_priv->tx_full = 0;
1913 netif_wake_queue (net_dev);
1914 }
1915}
1916
1917/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001918 * sis900_close - close sis900 device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 * @net_dev: the net device to be closed
1920 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001921 * Disable interrupts, stop the Tx and Rx Status Machine
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 * free Tx and RX socket buffer
1923 */
1924
1925static int sis900_close(struct net_device *net_dev)
1926{
1927 long ioaddr = net_dev->base_addr;
Wang Chen8f15ea42008-11-12 23:38:36 -08001928 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 struct sk_buff *skb;
1930 int i;
1931
1932 netif_stop_queue(net_dev);
1933
1934 /* Disable interrupts by clearing the interrupt mask. */
1935 outl(0x0000, ioaddr + imr);
1936 outl(0x0000, ioaddr + ier);
1937
1938 /* Stop the chip's Tx and Rx Status Machine */
1939 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
1940
1941 del_timer(&sis_priv->timer);
1942
1943 free_irq(net_dev->irq, net_dev);
1944
1945 /* Free Tx and RX skbuff */
1946 for (i = 0; i < NUM_RX_DESC; i++) {
1947 skb = sis_priv->rx_skbuff[i];
1948 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001949 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 sis_priv->rx_ring[i].bufptr,
1951 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1952 dev_kfree_skb(skb);
1953 sis_priv->rx_skbuff[i] = NULL;
1954 }
1955 }
1956 for (i = 0; i < NUM_TX_DESC; i++) {
1957 skb = sis_priv->tx_skbuff[i];
1958 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001959 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 sis_priv->tx_ring[i].bufptr, skb->len,
1961 PCI_DMA_TODEVICE);
1962 dev_kfree_skb(skb);
1963 sis_priv->tx_skbuff[i] = NULL;
1964 }
1965 }
1966
1967 /* Green! Put the chip in low-power mode. */
1968
1969 return 0;
1970}
1971
1972/**
1973 * sis900_get_drvinfo - Return information about driver
1974 * @net_dev: the net device to probe
1975 * @info: container for info returned
1976 *
1977 * Process ethtool command such as "ehtool -i" to show information
1978 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001979
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980static void sis900_get_drvinfo(struct net_device *net_dev,
1981 struct ethtool_drvinfo *info)
1982{
Wang Chen8f15ea42008-11-12 23:38:36 -08001983 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984
1985 strcpy (info->driver, SIS900_MODULE_NAME);
1986 strcpy (info->version, SIS900_DRV_VERSION);
1987 strcpy (info->bus_info, pci_name(sis_priv->pci_dev));
1988}
1989
1990static u32 sis900_get_msglevel(struct net_device *net_dev)
1991{
Wang Chen8f15ea42008-11-12 23:38:36 -08001992 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 return sis_priv->msg_enable;
1994}
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001995
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
1997{
Wang Chen8f15ea42008-11-12 23:38:36 -08001998 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 sis_priv->msg_enable = value;
2000}
2001
Daniele Venzanoda369b02005-05-12 20:13:14 -04002002static u32 sis900_get_link(struct net_device *net_dev)
2003{
Wang Chen8f15ea42008-11-12 23:38:36 -08002004 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002005 return mii_link_ok(&sis_priv->mii_info);
2006}
2007
2008static int sis900_get_settings(struct net_device *net_dev,
2009 struct ethtool_cmd *cmd)
2010{
Wang Chen8f15ea42008-11-12 23:38:36 -08002011 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002012 spin_lock_irq(&sis_priv->lock);
2013 mii_ethtool_gset(&sis_priv->mii_info, cmd);
2014 spin_unlock_irq(&sis_priv->lock);
2015 return 0;
2016}
2017
2018static int sis900_set_settings(struct net_device *net_dev,
2019 struct ethtool_cmd *cmd)
2020{
Wang Chen8f15ea42008-11-12 23:38:36 -08002021 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002022 int rt;
2023 spin_lock_irq(&sis_priv->lock);
2024 rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
2025 spin_unlock_irq(&sis_priv->lock);
2026 return rt;
2027}
2028
2029static int sis900_nway_reset(struct net_device *net_dev)
2030{
Wang Chen8f15ea42008-11-12 23:38:36 -08002031 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002032 return mii_nway_restart(&sis_priv->mii_info);
2033}
2034
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002035/**
2036 * sis900_set_wol - Set up Wake on Lan registers
2037 * @net_dev: the net device to probe
2038 * @wol: container for info passed to the driver
2039 *
2040 * Process ethtool command "wol" to setup wake on lan features.
2041 * SiS900 supports sending WoL events if a correct packet is received,
2042 * but there is no simple way to filter them to only a subset (broadcast,
2043 * multicast, unicast or arp).
2044 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002045
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002046static int sis900_set_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2047{
Wang Chen8f15ea42008-11-12 23:38:36 -08002048 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002049 long pmctrl_addr = net_dev->base_addr + pmctrl;
2050 u32 cfgpmcsr = 0, pmctrl_bits = 0;
2051
2052 if (wol->wolopts == 0) {
2053 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
Daniele Venzano7bef4b32006-02-25 17:01:09 -05002054 cfgpmcsr &= ~PME_EN;
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002055 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2056 outl(pmctrl_bits, pmctrl_addr);
2057 if (netif_msg_wol(sis_priv))
2058 printk(KERN_DEBUG "%s: Wake on LAN disabled\n", net_dev->name);
2059 return 0;
2060 }
2061
2062 if (wol->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST
2063 | WAKE_BCAST | WAKE_ARP))
2064 return -EINVAL;
2065
2066 if (wol->wolopts & WAKE_MAGIC)
2067 pmctrl_bits |= MAGICPKT;
2068 if (wol->wolopts & WAKE_PHY)
2069 pmctrl_bits |= LINKON;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002070
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002071 outl(pmctrl_bits, pmctrl_addr);
2072
2073 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
2074 cfgpmcsr |= PME_EN;
2075 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2076 if (netif_msg_wol(sis_priv))
2077 printk(KERN_DEBUG "%s: Wake on LAN enabled\n", net_dev->name);
2078
2079 return 0;
2080}
2081
2082static void sis900_get_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2083{
2084 long pmctrl_addr = net_dev->base_addr + pmctrl;
2085 u32 pmctrl_bits;
2086
2087 pmctrl_bits = inl(pmctrl_addr);
2088 if (pmctrl_bits & MAGICPKT)
2089 wol->wolopts |= WAKE_MAGIC;
2090 if (pmctrl_bits & LINKON)
2091 wol->wolopts |= WAKE_PHY;
2092
2093 wol->supported = (WAKE_PHY | WAKE_MAGIC);
2094}
2095
Jeff Garzik7282d492006-09-13 14:30:00 -04002096static const struct ethtool_ops sis900_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 .get_drvinfo = sis900_get_drvinfo,
2098 .get_msglevel = sis900_get_msglevel,
2099 .set_msglevel = sis900_set_msglevel,
Daniele Venzanoda369b02005-05-12 20:13:14 -04002100 .get_link = sis900_get_link,
2101 .get_settings = sis900_get_settings,
2102 .set_settings = sis900_set_settings,
2103 .nway_reset = sis900_nway_reset,
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002104 .get_wol = sis900_get_wol,
2105 .set_wol = sis900_set_wol
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106};
2107
2108/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002109 * mii_ioctl - process MII i/o control command
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 * @net_dev: the net device to command for
2111 * @rq: parameter for command
2112 * @cmd: the i/o command
2113 *
2114 * Process MII command like read/write MII register
2115 */
2116
2117static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
2118{
Wang Chen8f15ea42008-11-12 23:38:36 -08002119 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 struct mii_ioctl_data *data = if_mii(rq);
2121
2122 switch(cmd) {
2123 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2124 data->phy_id = sis_priv->mii->phy_addr;
2125 /* Fall Through */
2126
2127 case SIOCGMIIREG: /* Read MII PHY register. */
2128 data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
2129 return 0;
2130
2131 case SIOCSMIIREG: /* Write MII PHY register. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
2133 return 0;
2134 default:
2135 return -EOPNOTSUPP;
2136 }
2137}
2138
2139/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002140 * sis900_set_config - Set media type by net_device.set_config
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141 * @dev: the net device for media type change
2142 * @map: ifmap passed by ifconfig
2143 *
2144 * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
2145 * we support only port changes. All other runtime configuration
2146 * changes will be ignored
2147 */
2148
2149static int sis900_set_config(struct net_device *dev, struct ifmap *map)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002150{
Wang Chen8f15ea42008-11-12 23:38:36 -08002151 struct sis900_private *sis_priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 struct mii_phy *mii_phy = sis_priv->mii;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002153
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154 u16 status;
2155
2156 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
2157 /* we switch on the ifmap->port field. I couldn't find anything
2158 * like a definition or standard for the values of that field.
2159 * I think the meaning of those values is device specific. But
2160 * since I would like to change the media type via the ifconfig
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002161 * command I use the definition from linux/netdevice.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 * (which seems to be different from the ifport(pcmcia) definition) */
2163 switch(map->port){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002164 case IF_PORT_UNKNOWN: /* use auto here */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 dev->if_port = map->port;
2166 /* we are going to change the media type, so the Link
2167 * will be temporary down and we need to reflect that
2168 * here. When the Link comes up again, it will be
2169 * sensed by the sis_timer procedure, which also does
2170 * all the rest for us */
2171 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002172
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 /* read current state */
2174 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002175
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 /* enable auto negotiation and reset the negotioation
2177 * (I don't really know what the auto negatiotiation
2178 * reset really means, but it sounds for me right to
2179 * do one here) */
2180 mdio_write(dev, mii_phy->phy_addr,
2181 MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
2182
2183 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002184
2185 case IF_PORT_10BASET: /* 10BaseT */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 dev->if_port = map->port;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002187
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 /* we are going to change the media type, so the Link
2189 * will be temporary down and we need to reflect that
2190 * here. When the Link comes up again, it will be
2191 * sensed by the sis_timer procedure, which also does
2192 * all the rest for us */
2193 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002194
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195 /* set Speed to 10Mbps */
2196 /* read current state */
2197 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002198
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199 /* disable auto negotiation and force 10MBit mode*/
2200 mdio_write(dev, mii_phy->phy_addr,
2201 MII_CONTROL, status & ~(MII_CNTL_SPEED |
2202 MII_CNTL_AUTO));
2203 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002204
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 case IF_PORT_100BASET: /* 100BaseT */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002206 case IF_PORT_100BASETX: /* 100BaseTx */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 dev->if_port = map->port;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002208
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 /* we are going to change the media type, so the Link
2210 * will be temporary down and we need to reflect that
2211 * here. When the Link comes up again, it will be
2212 * sensed by the sis_timer procedure, which also does
2213 * all the rest for us */
2214 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002215
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216 /* set Speed to 100Mbps */
2217 /* disable auto negotiation and enable 100MBit Mode */
2218 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2219 mdio_write(dev, mii_phy->phy_addr,
2220 MII_CONTROL, (status & ~MII_CNTL_SPEED) |
2221 MII_CNTL_SPEED);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002222
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002224
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 case IF_PORT_10BASE2: /* 10Base2 */
2226 case IF_PORT_AUI: /* AUI */
2227 case IF_PORT_100BASEFX: /* 100BaseFx */
2228 /* These Modes are not supported (are they?)*/
2229 return -EOPNOTSUPP;
2230 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002231
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 default:
2233 return -EINVAL;
2234 }
2235 }
2236 return 0;
2237}
2238
2239/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002240 * sis900_mcast_bitnr - compute hashtable index
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241 * @addr: multicast address
2242 * @revision: revision id of chip
2243 *
2244 * SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
2245 * hash table, which makes this function a little bit different from other drivers
2246 * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002247 * multicast hash table.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248 */
2249
2250static inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
2251{
2252
2253 u32 crc = ether_crc(6, addr);
2254
2255 /* leave 8 or 7 most siginifant bits */
2256 if ((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
2257 return ((int)(crc >> 24));
2258 else
2259 return ((int)(crc >> 25));
2260}
2261
2262/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002263 * set_rx_mode - Set SiS900 receive mode
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 * @net_dev: the net device to be set
2265 *
2266 * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
2267 * And set the appropriate multicast filter.
2268 * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
2269 */
2270
2271static void set_rx_mode(struct net_device *net_dev)
2272{
2273 long ioaddr = net_dev->base_addr;
Wang Chen8f15ea42008-11-12 23:38:36 -08002274 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
2276 int i, table_entries;
2277 u32 rx_mode;
2278
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08002279 /* 635 Hash Table entries = 256(2^16) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280 if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
2281 (sis_priv->chipset_rev == SIS900B_900_REV))
2282 table_entries = 16;
2283 else
2284 table_entries = 8;
2285
2286 if (net_dev->flags & IFF_PROMISC) {
2287 /* Accept any kinds of packets */
2288 rx_mode = RFPromiscuous;
2289 for (i = 0; i < table_entries; i++)
2290 mc_filter[i] = 0xffff;
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00002291 } else if ((netdev_mc_count(net_dev) > multicast_filter_limit) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 (net_dev->flags & IFF_ALLMULTI)) {
2293 /* too many multicast addresses or accept all multicast packet */
2294 rx_mode = RFAAB | RFAAM;
2295 for (i = 0; i < table_entries; i++)
2296 mc_filter[i] = 0xffff;
2297 } else {
2298 /* Accept Broadcast packet, destination address matchs our
2299 * MAC address, use Receive Filter to reject unwanted MCAST
2300 * packets */
2301 struct dev_mc_list *mclist;
2302 rx_mode = RFAAB;
Jiri Pirko55085902010-02-18 00:42:54 +00002303
2304 netdev_for_each_mc_addr(mclist, net_dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 unsigned int bit_nr =
2306 sis900_mcast_bitnr(mclist->dmi_addr, sis_priv->chipset_rev);
2307 mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
2308 }
2309 }
2310
2311 /* update Multicast Hash Table in Receive Filter */
2312 for (i = 0; i < table_entries; i++) {
2313 /* why plus 0x04 ??, That makes the correct value for hash table. */
2314 outl((u32)(0x00000004+i) << RFADDR_shift, ioaddr + rfcr);
2315 outl(mc_filter[i], ioaddr + rfdr);
2316 }
2317
2318 outl(RFEN | rx_mode, ioaddr + rfcr);
2319
2320 /* sis900 is capable of looping back packets at MAC level for
2321 * debugging purpose */
2322 if (net_dev->flags & IFF_LOOPBACK) {
2323 u32 cr_saved;
2324 /* We must disable Tx/Rx before setting loopback mode */
2325 cr_saved = inl(ioaddr + cr);
2326 outl(cr_saved | TxDIS | RxDIS, ioaddr + cr);
2327 /* enable loopback */
2328 outl(inl(ioaddr + txcfg) | TxMLB, ioaddr + txcfg);
2329 outl(inl(ioaddr + rxcfg) | RxATX, ioaddr + rxcfg);
2330 /* restore cr */
2331 outl(cr_saved, ioaddr + cr);
2332 }
2333
2334 return;
2335}
2336
2337/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002338 * sis900_reset - Reset sis900 MAC
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 * @net_dev: the net device to reset
2340 *
2341 * reset sis900 MAC and wait until finished
2342 * reset through command register
2343 * change backoff algorithm for 900B0 & 635 M/B
2344 */
2345
2346static void sis900_reset(struct net_device *net_dev)
2347{
Wang Chen8f15ea42008-11-12 23:38:36 -08002348 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 long ioaddr = net_dev->base_addr;
2350 int i = 0;
2351 u32 status = TxRCMP | RxRCMP;
2352
2353 outl(0, ioaddr + ier);
2354 outl(0, ioaddr + imr);
2355 outl(0, ioaddr + rfcr);
2356
2357 outl(RxRESET | TxRESET | RESET | inl(ioaddr + cr), ioaddr + cr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002358
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 /* Check that the chip has finished the reset. */
2360 while (status && (i++ < 1000)) {
2361 status ^= (inl(isr + ioaddr) & status);
2362 }
2363
2364 if( (sis_priv->chipset_rev >= SIS635A_900_REV) ||
2365 (sis_priv->chipset_rev == SIS900B_900_REV) )
2366 outl(PESEL | RND_CNT, ioaddr + cfg);
2367 else
2368 outl(PESEL, ioaddr + cfg);
2369}
2370
2371/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002372 * sis900_remove - Remove sis900 device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 * @pci_dev: the pci device to be removed
2374 *
2375 * remove and release SiS900 net device
2376 */
2377
2378static void __devexit sis900_remove(struct pci_dev *pci_dev)
2379{
2380 struct net_device *net_dev = pci_get_drvdata(pci_dev);
Wang Chen8f15ea42008-11-12 23:38:36 -08002381 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 struct mii_phy *phy = NULL;
2383
2384 while (sis_priv->first_mii) {
2385 phy = sis_priv->first_mii;
2386 sis_priv->first_mii = phy->next;
2387 kfree(phy);
2388 }
2389
2390 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
2391 sis_priv->rx_ring_dma);
2392 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
2393 sis_priv->tx_ring_dma);
2394 unregister_netdev(net_dev);
2395 free_netdev(net_dev);
2396 pci_release_regions(pci_dev);
2397 pci_set_drvdata(pci_dev, NULL);
2398}
2399
2400#ifdef CONFIG_PM
2401
2402static int sis900_suspend(struct pci_dev *pci_dev, pm_message_t state)
2403{
2404 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2405 long ioaddr = net_dev->base_addr;
2406
2407 if(!netif_running(net_dev))
2408 return 0;
2409
2410 netif_stop_queue(net_dev);
2411 netif_device_detach(net_dev);
2412
2413 /* Stop the chip's Tx and Rx Status Machine */
2414 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
2415
2416 pci_set_power_state(pci_dev, PCI_D3hot);
2417 pci_save_state(pci_dev);
2418
2419 return 0;
2420}
2421
2422static int sis900_resume(struct pci_dev *pci_dev)
2423{
2424 struct net_device *net_dev = pci_get_drvdata(pci_dev);
Wang Chen8f15ea42008-11-12 23:38:36 -08002425 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 long ioaddr = net_dev->base_addr;
2427
2428 if(!netif_running(net_dev))
2429 return 0;
2430 pci_restore_state(pci_dev);
2431 pci_set_power_state(pci_dev, PCI_D0);
2432
2433 sis900_init_rxfilter(net_dev);
2434
2435 sis900_init_tx_ring(net_dev);
2436 sis900_init_rx_ring(net_dev);
2437
2438 set_rx_mode(net_dev);
2439
2440 netif_device_attach(net_dev);
2441 netif_start_queue(net_dev);
2442
2443 /* Workaround for EDB */
2444 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
2445
2446 /* Enable all known interrupts by setting the interrupt mask. */
2447 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
2448 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
2449 outl(IE, ioaddr + ier);
2450
2451 sis900_check_mode(net_dev, sis_priv->mii);
2452
2453 return 0;
2454}
2455#endif /* CONFIG_PM */
2456
2457static struct pci_driver sis900_pci_driver = {
2458 .name = SIS900_MODULE_NAME,
2459 .id_table = sis900_pci_tbl,
2460 .probe = sis900_probe,
2461 .remove = __devexit_p(sis900_remove),
2462#ifdef CONFIG_PM
2463 .suspend = sis900_suspend,
2464 .resume = sis900_resume,
2465#endif /* CONFIG_PM */
2466};
2467
2468static int __init sis900_init_module(void)
2469{
2470/* when a module, this is printed whether or not devices are found in probe */
2471#ifdef MODULE
2472 printk(version);
2473#endif
2474
Jeff Garzik29917622006-08-19 17:48:59 -04002475 return pci_register_driver(&sis900_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002476}
2477
2478static void __exit sis900_cleanup_module(void)
2479{
2480 pci_unregister_driver(&sis900_pci_driver);
2481}
2482
2483module_init(sis900_init_module);
2484module_exit(sis900_cleanup_module);
2485