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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
Eric Dumazet807540b2010-09-23 05:40:09 +0000835 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836}
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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861}
862
863/**
864 * mdio_read - read MII PHY register
865 * @net_dev: the net device to read
866 * @phy_id: the phy address to read
867 * @location: the phy regiester id to read
868 *
869 * Read MII registers through MDIO and MDC
870 * using MDIO management frame structure and protocol(defined by ISO/IEC).
871 * Please see SiS7014 or ICS spec
872 */
873
Daniele Venzanoda369b02005-05-12 20:13:14 -0400874static int mdio_read(struct net_device *net_dev, int phy_id, int location)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875{
876 long mdio_addr = net_dev->base_addr + mear;
877 int mii_cmd = MIIread|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
878 u16 retval = 0;
879 int i;
880
881 mdio_reset(mdio_addr);
882 mdio_idle(mdio_addr);
883
884 for (i = 15; i >= 0; i--) {
885 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
886 outl(dataval, mdio_addr);
887 mdio_delay();
888 outl(dataval | MDC, mdio_addr);
889 mdio_delay();
890 }
891
892 /* Read the 16 data bits. */
893 for (i = 16; i > 0; i--) {
894 outl(0, mdio_addr);
895 mdio_delay();
896 retval = (retval << 1) | ((inl(mdio_addr) & MDIO) ? 1 : 0);
897 outl(MDC, mdio_addr);
898 mdio_delay();
899 }
900 outl(0x00, mdio_addr);
901
902 return retval;
903}
904
905/**
906 * mdio_write - write MII PHY register
907 * @net_dev: the net device to write
908 * @phy_id: the phy address to write
909 * @location: the phy regiester id to write
910 * @value: the register value to write with
911 *
912 * Write MII registers with @value through MDIO and MDC
913 * using MDIO management frame structure and protocol(defined by ISO/IEC)
914 * please see SiS7014 or ICS spec
915 */
916
917static void mdio_write(struct net_device *net_dev, int phy_id, int location,
918 int value)
919{
920 long mdio_addr = net_dev->base_addr + mear;
921 int mii_cmd = MIIwrite|(phy_id<<MIIpmdShift)|(location<<MIIregShift);
922 int i;
923
924 mdio_reset(mdio_addr);
925 mdio_idle(mdio_addr);
926
927 /* Shift the command bits out. */
928 for (i = 15; i >= 0; i--) {
929 int dataval = (mii_cmd & (1 << i)) ? MDDIR | MDIO : MDDIR;
930 outb(dataval, mdio_addr);
931 mdio_delay();
932 outb(dataval | MDC, mdio_addr);
933 mdio_delay();
934 }
935 mdio_delay();
936
937 /* Shift the value bits out. */
938 for (i = 15; i >= 0; i--) {
939 int dataval = (value & (1 << i)) ? MDDIR | MDIO : MDDIR;
940 outl(dataval, mdio_addr);
941 mdio_delay();
942 outl(dataval | MDC, mdio_addr);
943 mdio_delay();
944 }
945 mdio_delay();
946
947 /* Clear out extra bits. */
948 for (i = 2; i > 0; i--) {
949 outb(0, mdio_addr);
950 mdio_delay();
951 outb(MDC, mdio_addr);
952 mdio_delay();
953 }
954 outl(0x00, mdio_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955}
956
957
958/**
959 * sis900_reset_phy - reset sis900 mii phy.
960 * @net_dev: the net device to write
961 * @phy_addr: default phy address
962 *
963 * Some specific phy can't work properly without reset.
964 * This function will be called during initialization and
965 * link status change from ON to DOWN.
966 */
967
968static u16 sis900_reset_phy(struct net_device *net_dev, int phy_addr)
969{
Andrew Mortonf3be9742007-03-06 02:41:55 -0800970 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 u16 status;
972
Andrew Mortonf3be9742007-03-06 02:41:55 -0800973 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 status = mdio_read(net_dev, phy_addr, MII_STATUS);
975
976 mdio_write( net_dev, phy_addr, MII_CONTROL, MII_CNTL_RESET );
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400977
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 return status;
979}
980
981#ifdef CONFIG_NET_POLL_CONTROLLER
982/*
983 * Polling 'interrupt' - used by things like netconsole to send skbs
984 * without having to re-enable interrupts. It's not called while
985 * the interrupt routine is executing.
986*/
987static void sis900_poll(struct net_device *dev)
988{
989 disable_irq(dev->irq);
David Howells7d12e782006-10-05 14:55:46 +0100990 sis900_interrupt(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 enable_irq(dev->irq);
992}
993#endif
994
995/**
996 * sis900_open - open sis900 device
997 * @net_dev: the net device to open
998 *
999 * Do some initialization and start net interface.
1000 * enable interrupts and set sis900 timer.
1001 */
1002
1003static int
1004sis900_open(struct net_device *net_dev)
1005{
Wang Chen8f15ea42008-11-12 23:38:36 -08001006 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 long ioaddr = net_dev->base_addr;
1008 int ret;
1009
1010 /* Soft reset the chip. */
1011 sis900_reset(net_dev);
1012
1013 /* Equalizer workaround Rule */
1014 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1015
Joe Perchesa0607fd2009-11-18 23:29:17 -08001016 ret = request_irq(net_dev->irq, sis900_interrupt, IRQF_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 net_dev->name, net_dev);
1018 if (ret)
1019 return ret;
1020
1021 sis900_init_rxfilter(net_dev);
1022
1023 sis900_init_tx_ring(net_dev);
1024 sis900_init_rx_ring(net_dev);
1025
1026 set_rx_mode(net_dev);
1027
1028 netif_start_queue(net_dev);
1029
1030 /* Workaround for EDB */
1031 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
1032
1033 /* Enable all known interrupts by setting the interrupt mask. */
1034 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
1035 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
1036 outl(IE, ioaddr + ier);
1037
1038 sis900_check_mode(net_dev, sis_priv->mii);
1039
1040 /* Set the timer to switch to check for link beat and perhaps switch
1041 to an alternate media type. */
1042 init_timer(&sis_priv->timer);
1043 sis_priv->timer.expires = jiffies + HZ;
1044 sis_priv->timer.data = (unsigned long)net_dev;
Joe Perchesc061b182010-08-23 18:20:03 +00001045 sis_priv->timer.function = sis900_timer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 add_timer(&sis_priv->timer);
1047
1048 return 0;
1049}
1050
1051/**
1052 * sis900_init_rxfilter - Initialize the Rx filter
1053 * @net_dev: the net device to initialize for
1054 *
1055 * Set receive filter address to our MAC address
1056 * and enable packet filtering.
1057 */
1058
1059static void
1060sis900_init_rxfilter (struct net_device * net_dev)
1061{
Wang Chen8f15ea42008-11-12 23:38:36 -08001062 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 long ioaddr = net_dev->base_addr;
1064 u32 rfcrSave;
1065 u32 i;
1066
1067 rfcrSave = inl(rfcr + ioaddr);
1068
1069 /* disable packet filtering before setting filter */
1070 outl(rfcrSave & ~RFEN, rfcr + ioaddr);
1071
1072 /* load MAC addr to filter data register */
1073 for (i = 0 ; i < 3 ; i++) {
1074 u32 w;
1075
1076 w = (u32) *((u16 *)(net_dev->dev_addr)+i);
1077 outl((i << RFADDR_shift), ioaddr + rfcr);
1078 outl(w, ioaddr + rfdr);
1079
1080 if (netif_msg_hw(sis_priv)) {
1081 printk(KERN_DEBUG "%s: Receive Filter Addrss[%d]=%x\n",
1082 net_dev->name, i, inl(ioaddr + rfdr));
1083 }
1084 }
1085
1086 /* enable packet filtering */
1087 outl(rfcrSave | RFEN, rfcr + ioaddr);
1088}
1089
1090/**
1091 * sis900_init_tx_ring - Initialize the Tx descriptor ring
1092 * @net_dev: the net device to initialize for
1093 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001094 * Initialize the Tx descriptor ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 */
1096
1097static void
1098sis900_init_tx_ring(struct net_device *net_dev)
1099{
Wang Chen8f15ea42008-11-12 23:38:36 -08001100 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 long ioaddr = net_dev->base_addr;
1102 int i;
1103
1104 sis_priv->tx_full = 0;
1105 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1106
1107 for (i = 0; i < NUM_TX_DESC; i++) {
1108 sis_priv->tx_skbuff[i] = NULL;
1109
1110 sis_priv->tx_ring[i].link = sis_priv->tx_ring_dma +
1111 ((i+1)%NUM_TX_DESC)*sizeof(BufferDesc);
1112 sis_priv->tx_ring[i].cmdsts = 0;
1113 sis_priv->tx_ring[i].bufptr = 0;
1114 }
1115
1116 /* load Transmit Descriptor Register */
1117 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1118 if (netif_msg_hw(sis_priv))
1119 printk(KERN_DEBUG "%s: TX descriptor register loaded with: %8.8x\n",
1120 net_dev->name, inl(ioaddr + txdp));
1121}
1122
1123/**
1124 * sis900_init_rx_ring - Initialize the Rx descriptor ring
1125 * @net_dev: the net device to initialize for
1126 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001127 * Initialize the Rx descriptor ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 * and pre-allocate recevie buffers (socket buffer)
1129 */
1130
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001131static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132sis900_init_rx_ring(struct net_device *net_dev)
1133{
Wang Chen8f15ea42008-11-12 23:38:36 -08001134 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 long ioaddr = net_dev->base_addr;
1136 int i;
1137
1138 sis_priv->cur_rx = 0;
1139 sis_priv->dirty_rx = 0;
1140
1141 /* init RX descriptor */
1142 for (i = 0; i < NUM_RX_DESC; i++) {
1143 sis_priv->rx_skbuff[i] = NULL;
1144
1145 sis_priv->rx_ring[i].link = sis_priv->rx_ring_dma +
1146 ((i+1)%NUM_RX_DESC)*sizeof(BufferDesc);
1147 sis_priv->rx_ring[i].cmdsts = 0;
1148 sis_priv->rx_ring[i].bufptr = 0;
1149 }
1150
1151 /* allocate sock buffers */
1152 for (i = 0; i < NUM_RX_DESC; i++) {
1153 struct sk_buff *skb;
1154
1155 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1156 /* not enough memory for skbuff, this makes a "hole"
1157 on the buffer ring, it is not clear how the
1158 hardware will react to this kind of degenerated
1159 buffer */
1160 break;
1161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 sis_priv->rx_skbuff[i] = skb;
1163 sis_priv->rx_ring[i].cmdsts = RX_BUF_SIZE;
1164 sis_priv->rx_ring[i].bufptr = pci_map_single(sis_priv->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001165 skb->data, RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 }
1167 sis_priv->dirty_rx = (unsigned int) (i - NUM_RX_DESC);
1168
1169 /* load Receive Descriptor Register */
1170 outl(sis_priv->rx_ring_dma, ioaddr + rxdp);
1171 if (netif_msg_hw(sis_priv))
1172 printk(KERN_DEBUG "%s: RX descriptor register loaded with: %8.8x\n",
1173 net_dev->name, inl(ioaddr + rxdp));
1174}
1175
1176/**
1177 * sis630_set_eq - set phy equalizer value for 630 LAN
1178 * @net_dev: the net device to set equalizer value
1179 * @revision: 630 LAN revision number
1180 *
1181 * 630E equalizer workaround rule(Cyrus Huang 08/15)
1182 * PHY register 14h(Test)
1183 * Bit 14: 0 -- Automatically dectect (default)
1184 * 1 -- Manually set Equalizer filter
1185 * Bit 13: 0 -- (Default)
1186 * 1 -- Speed up convergence of equalizer setting
1187 * Bit 9 : 0 -- (Default)
1188 * 1 -- Disable Baseline Wander
1189 * Bit 3~7 -- Equalizer filter setting
1190 * Link ON: Set Bit 9, 13 to 1, Bit 14 to 0
1191 * Then calculate equalizer value
1192 * Then set equalizer value, and set Bit 14 to 1, Bit 9 to 0
1193 * Link Off:Set Bit 13 to 1, Bit 14 to 0
1194 * Calculate Equalizer value:
1195 * When Link is ON and Bit 14 is 0, SIS900PHY will auto-dectect proper equalizer value.
1196 * When the equalizer is stable, this value is not a fixed value. It will be within
1197 * a small range(eg. 7~9). Then we get a minimum and a maximum value(eg. min=7, max=9)
1198 * 0 <= max <= 4 --> set equalizer to max
1199 * 5 <= max <= 14 --> set equalizer to max+1 or set equalizer to max+2 if max == min
1200 * max >= 15 --> set equalizer to max+5 or set equalizer to max+6 if max == min
1201 */
1202
1203static void sis630_set_eq(struct net_device *net_dev, u8 revision)
1204{
Wang Chen8f15ea42008-11-12 23:38:36 -08001205 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 u16 reg14h, eq_value=0, max_value=0, min_value=0;
1207 int i, maxcount=10;
1208
1209 if ( !(revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1210 revision == SIS630A_900_REV || revision == SIS630ET_900_REV) )
1211 return;
1212
1213 if (netif_carrier_ok(net_dev)) {
1214 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1215 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1216 (0x2200 | reg14h) & 0xBFFF);
1217 for (i=0; i < maxcount; i++) {
1218 eq_value = (0x00F8 & mdio_read(net_dev,
1219 sis_priv->cur_phy, MII_RESV)) >> 3;
1220 if (i == 0)
1221 max_value=min_value=eq_value;
1222 max_value = (eq_value > max_value) ?
1223 eq_value : max_value;
1224 min_value = (eq_value < min_value) ?
1225 eq_value : min_value;
1226 }
1227 /* 630E rule to determine the equalizer value */
1228 if (revision == SIS630E_900_REV || revision == SIS630EA1_900_REV ||
1229 revision == SIS630ET_900_REV) {
1230 if (max_value < 5)
1231 eq_value = max_value;
1232 else if (max_value >= 5 && max_value < 15)
1233 eq_value = (max_value == min_value) ?
1234 max_value+2 : max_value+1;
1235 else if (max_value >= 15)
1236 eq_value=(max_value == min_value) ?
1237 max_value+6 : max_value+5;
1238 }
1239 /* 630B0&B1 rule to determine the equalizer value */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001240 if (revision == SIS630A_900_REV &&
1241 (sis_priv->host_bridge_rev == SIS630B0 ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 sis_priv->host_bridge_rev == SIS630B1)) {
1243 if (max_value == 0)
1244 eq_value = 3;
1245 else
1246 eq_value = (max_value + min_value + 1)/2;
1247 }
1248 /* write equalizer value and setting */
1249 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
1250 reg14h = (reg14h & 0xFF07) | ((eq_value << 3) & 0x00F8);
1251 reg14h = (reg14h | 0x6000) & 0xFDFF;
1252 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV, reg14h);
1253 } else {
1254 reg14h = mdio_read(net_dev, sis_priv->cur_phy, MII_RESV);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001255 if (revision == SIS630A_900_REV &&
1256 (sis_priv->host_bridge_rev == SIS630B0 ||
1257 sis_priv->host_bridge_rev == SIS630B1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1259 (reg14h | 0x2200) & 0xBFFF);
1260 else
1261 mdio_write(net_dev, sis_priv->cur_phy, MII_RESV,
1262 (reg14h | 0x2000) & 0xBFFF);
1263 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264}
1265
1266/**
1267 * sis900_timer - sis900 timer routine
1268 * @data: pointer to sis900 net device
1269 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001270 * On each timer ticks we check two things,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 * link status (ON/OFF) and link mode (10/100/Full/Half)
1272 */
1273
1274static void sis900_timer(unsigned long data)
1275{
1276 struct net_device *net_dev = (struct net_device *)data;
Wang Chen8f15ea42008-11-12 23:38:36 -08001277 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 struct mii_phy *mii_phy = sis_priv->mii;
Arjan van de Venf71e1302006-03-03 21:33:57 -05001279 static const int next_tick = 5*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 u16 status;
1281
1282 if (!sis_priv->autong_complete){
Ingo Molnaref0cd872008-11-25 16:52:13 -08001283 int uninitialized_var(speed), duplex = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284
1285 sis900_read_mode(net_dev, &speed, &duplex);
1286 if (duplex){
1287 sis900_set_mode(net_dev->base_addr, speed, duplex);
1288 sis630_set_eq(net_dev, sis_priv->chipset_rev);
1289 netif_start_queue(net_dev);
1290 }
1291
1292 sis_priv->timer.expires = jiffies + HZ;
1293 add_timer(&sis_priv->timer);
1294 return;
1295 }
1296
1297 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1298 status = mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS);
1299
1300 /* Link OFF -> ON */
1301 if (!netif_carrier_ok(net_dev)) {
1302 LookForLink:
1303 /* Search for new PHY */
1304 status = sis900_default_phy(net_dev);
1305 mii_phy = sis_priv->mii;
1306
1307 if (status & MII_STAT_LINK){
1308 sis900_check_mode(net_dev, mii_phy);
1309 netif_carrier_on(net_dev);
1310 }
1311 } else {
1312 /* Link ON -> OFF */
1313 if (!(status & MII_STAT_LINK)){
1314 netif_carrier_off(net_dev);
1315 if(netif_msg_link(sis_priv))
1316 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1317
1318 /* Change mode issue */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001319 if ((mii_phy->phy_id0 == 0x001D) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 ((mii_phy->phy_id1 & 0xFFF0) == 0x8000))
1321 sis900_reset_phy(net_dev, sis_priv->cur_phy);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001322
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 sis630_set_eq(net_dev, sis_priv->chipset_rev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001324
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 goto LookForLink;
1326 }
1327 }
1328
1329 sis_priv->timer.expires = jiffies + next_tick;
1330 add_timer(&sis_priv->timer);
1331}
1332
1333/**
1334 * sis900_check_mode - check the media mode for sis900
1335 * @net_dev: the net device to be checked
1336 * @mii_phy: the mii phy
1337 *
1338 * Older driver gets the media mode from mii status output
1339 * register. Now we set our media capability and auto-negotiate
1340 * to get the upper bound of speed and duplex between two ends.
1341 * If the types of mii phy is HOME, it doesn't need to auto-negotiate
1342 * and autong_complete should be set to 1.
1343 */
1344
1345static void sis900_check_mode(struct net_device *net_dev, struct mii_phy *mii_phy)
1346{
Wang Chen8f15ea42008-11-12 23:38:36 -08001347 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 long ioaddr = net_dev->base_addr;
1349 int speed, duplex;
1350
1351 if (mii_phy->phy_types == LAN) {
1352 outl(~EXD & inl(ioaddr + cfg), ioaddr + cfg);
1353 sis900_set_capability(net_dev , mii_phy);
1354 sis900_auto_negotiate(net_dev, sis_priv->cur_phy);
1355 } else {
1356 outl(EXD | inl(ioaddr + cfg), ioaddr + cfg);
1357 speed = HW_SPEED_HOME;
1358 duplex = FDX_CAPABLE_HALF_SELECTED;
1359 sis900_set_mode(ioaddr, speed, duplex);
1360 sis_priv->autong_complete = 1;
1361 }
1362}
1363
1364/**
1365 * sis900_set_mode - Set the media mode of mac register.
1366 * @ioaddr: the address of the device
1367 * @speed : the transmit speed to be determined
1368 * @duplex: the duplex mode to be determined
1369 *
1370 * Set the media mode of mac register txcfg/rxcfg according to
1371 * speed and duplex of phy. Bit EDB_MASTER_EN indicates the EDB
1372 * bus is used instead of PCI bus. When this bit is set 1, the
1373 * Max DMA Burst Size for TX/RX DMA should be no larger than 16
1374 * double words.
1375 */
1376
1377static void sis900_set_mode (long ioaddr, int speed, int duplex)
1378{
1379 u32 tx_flags = 0, rx_flags = 0;
1380
1381 if (inl(ioaddr + cfg) & EDB_MASTER_EN) {
1382 tx_flags = TxATP | (DMA_BURST_64 << TxMXDMA_shift) |
1383 (TX_FILL_THRESH << TxFILLT_shift);
1384 rx_flags = DMA_BURST_64 << RxMXDMA_shift;
1385 } else {
1386 tx_flags = TxATP | (DMA_BURST_512 << TxMXDMA_shift) |
1387 (TX_FILL_THRESH << TxFILLT_shift);
1388 rx_flags = DMA_BURST_512 << RxMXDMA_shift;
1389 }
1390
1391 if (speed == HW_SPEED_HOME || speed == HW_SPEED_10_MBPS) {
1392 rx_flags |= (RxDRNT_10 << RxDRNT_shift);
1393 tx_flags |= (TxDRNT_10 << TxDRNT_shift);
1394 } else {
1395 rx_flags |= (RxDRNT_100 << RxDRNT_shift);
1396 tx_flags |= (TxDRNT_100 << TxDRNT_shift);
1397 }
1398
1399 if (duplex == FDX_CAPABLE_FULL_SELECTED) {
1400 tx_flags |= (TxCSI | TxHBI);
1401 rx_flags |= RxATX;
1402 }
1403
Daniele Venzanod269a692006-04-17 10:28:06 +02001404#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1405 /* Can accept Jumbo packet */
1406 rx_flags |= RxAJAB;
1407#endif
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 outl (tx_flags, ioaddr + txcfg);
1410 outl (rx_flags, ioaddr + rxcfg);
1411}
1412
1413/**
1414 * sis900_auto_negotiate - Set the Auto-Negotiation Enable/Reset bit.
1415 * @net_dev: the net device to read mode for
1416 * @phy_addr: mii phy address
1417 *
1418 * If the adapter is link-on, set the auto-negotiate enable/reset bit.
1419 * autong_complete should be set to 0 when starting auto-negotiation.
1420 * autong_complete should be set to 1 if we didn't start auto-negotiation.
1421 * sis900_timer will wait for link on again if autong_complete = 0.
1422 */
1423
1424static void sis900_auto_negotiate(struct net_device *net_dev, int phy_addr)
1425{
Wang Chen8f15ea42008-11-12 23:38:36 -08001426 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 int i = 0;
1428 u32 status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001429
Andrew Mortonf3be9742007-03-06 02:41:55 -08001430 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1432
1433 if (!(status & MII_STAT_LINK)){
1434 if(netif_msg_link(sis_priv))
1435 printk(KERN_INFO "%s: Media Link Off\n", net_dev->name);
1436 sis_priv->autong_complete = 1;
1437 netif_carrier_off(net_dev);
1438 return;
1439 }
1440
1441 /* (Re)start AutoNegotiate */
1442 mdio_write(net_dev, phy_addr, MII_CONTROL,
1443 MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
1444 sis_priv->autong_complete = 0;
1445}
1446
1447
1448/**
1449 * sis900_read_mode - read media mode for sis900 internal phy
1450 * @net_dev: the net device to read mode for
1451 * @speed : the transmit speed to be determined
1452 * @duplex : the duplex mode to be determined
1453 *
1454 * The capability of remote end will be put in mii register autorec
1455 * after auto-negotiation. Use AND operation to get the upper bound
1456 * of speed and duplex between two ends.
1457 */
1458
1459static void sis900_read_mode(struct net_device *net_dev, int *speed, int *duplex)
1460{
Wang Chen8f15ea42008-11-12 23:38:36 -08001461 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 struct mii_phy *phy = sis_priv->mii;
1463 int phy_addr = sis_priv->cur_phy;
1464 u32 status;
1465 u16 autoadv, autorec;
Andrew Mortonf3be9742007-03-06 02:41:55 -08001466 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467
Andrew Mortonf3be9742007-03-06 02:41:55 -08001468 for (i = 0; i < 2; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 status = mdio_read(net_dev, phy_addr, MII_STATUS);
1470
1471 if (!(status & MII_STAT_LINK))
1472 return;
1473
1474 /* AutoNegotiate completed */
1475 autoadv = mdio_read(net_dev, phy_addr, MII_ANADV);
1476 autorec = mdio_read(net_dev, phy_addr, MII_ANLPAR);
1477 status = autoadv & autorec;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001478
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 *speed = HW_SPEED_10_MBPS;
1480 *duplex = FDX_CAPABLE_HALF_SELECTED;
1481
1482 if (status & (MII_NWAY_TX | MII_NWAY_TX_FDX))
1483 *speed = HW_SPEED_100_MBPS;
1484 if (status & ( MII_NWAY_TX_FDX | MII_NWAY_T_FDX))
1485 *duplex = FDX_CAPABLE_FULL_SELECTED;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001486
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 sis_priv->autong_complete = 1;
1488
1489 /* Workaround for Realtek RTL8201 PHY issue */
1490 if ((phy->phy_id0 == 0x0000) && ((phy->phy_id1 & 0xFFF0) == 0x8200)) {
1491 if (mdio_read(net_dev, phy_addr, MII_CONTROL) & MII_CNTL_FDX)
1492 *duplex = FDX_CAPABLE_FULL_SELECTED;
1493 if (mdio_read(net_dev, phy_addr, 0x0019) & 0x01)
1494 *speed = HW_SPEED_100_MBPS;
1495 }
1496
1497 if(netif_msg_link(sis_priv))
Frans Pop2381a552010-03-24 07:57:36 +00001498 printk(KERN_INFO "%s: Media Link On %s %s-duplex\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 net_dev->name,
1500 *speed == HW_SPEED_100_MBPS ?
1501 "100mbps" : "10mbps",
1502 *duplex == FDX_CAPABLE_FULL_SELECTED ?
1503 "full" : "half");
1504}
1505
1506/**
1507 * sis900_tx_timeout - sis900 transmit timeout routine
1508 * @net_dev: the net device to transmit
1509 *
1510 * print transmit timeout status
1511 * disable interrupts and do some tasks
1512 */
1513
1514static void sis900_tx_timeout(struct net_device *net_dev)
1515{
Wang Chen8f15ea42008-11-12 23:38:36 -08001516 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 long ioaddr = net_dev->base_addr;
1518 unsigned long flags;
1519 int i;
1520
1521 if(netif_msg_tx_err(sis_priv))
Frans Pop2381a552010-03-24 07:57:36 +00001522 printk(KERN_INFO "%s: Transmit timeout, status %8.8x %8.8x\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 net_dev->name, inl(ioaddr + cr), inl(ioaddr + isr));
1524
1525 /* Disable interrupts by clearing the interrupt mask. */
1526 outl(0x0000, ioaddr + imr);
1527
1528 /* use spinlock to prevent interrupt handler accessing buffer ring */
1529 spin_lock_irqsave(&sis_priv->lock, flags);
1530
1531 /* discard unsent packets */
1532 sis_priv->dirty_tx = sis_priv->cur_tx = 0;
1533 for (i = 0; i < NUM_TX_DESC; i++) {
1534 struct sk_buff *skb = sis_priv->tx_skbuff[i];
1535
1536 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001537 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 sis_priv->tx_ring[i].bufptr, skb->len,
1539 PCI_DMA_TODEVICE);
1540 dev_kfree_skb_irq(skb);
1541 sis_priv->tx_skbuff[i] = NULL;
1542 sis_priv->tx_ring[i].cmdsts = 0;
1543 sis_priv->tx_ring[i].bufptr = 0;
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001544 net_dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 }
1546 }
1547 sis_priv->tx_full = 0;
1548 netif_wake_queue(net_dev);
1549
1550 spin_unlock_irqrestore(&sis_priv->lock, flags);
1551
Eric Dumazet1ae5dc32010-05-10 05:01:31 -07001552 net_dev->trans_start = jiffies; /* prevent tx timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553
1554 /* load Transmit Descriptor Register */
1555 outl(sis_priv->tx_ring_dma, ioaddr + txdp);
1556
1557 /* Enable all known interrupts by setting the interrupt mask. */
1558 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559}
1560
1561/**
1562 * sis900_start_xmit - sis900 start transmit routine
1563 * @skb: socket buffer pointer to put the data being transmitted
1564 * @net_dev: the net device to transmit with
1565 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001566 * Set the transmit buffer descriptor,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 * and write TxENA to enable transmit state machine.
1568 * tell upper layer if the buffer is full
1569 */
1570
Stephen Hemminger613573252009-08-31 19:50:58 +00001571static netdev_tx_t
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572sis900_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
1573{
Wang Chen8f15ea42008-11-12 23:38:36 -08001574 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 long ioaddr = net_dev->base_addr;
1576 unsigned int entry;
1577 unsigned long flags;
1578 unsigned int index_cur_tx, index_dirty_tx;
1579 unsigned int count_dirty_tx;
1580
1581 /* Don't transmit data before the complete of auto-negotiation */
1582 if(!sis_priv->autong_complete){
1583 netif_stop_queue(net_dev);
Patrick McHardy5b548142009-06-12 06:22:29 +00001584 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 }
1586
1587 spin_lock_irqsave(&sis_priv->lock, flags);
1588
1589 /* Calculate the next Tx descriptor entry. */
1590 entry = sis_priv->cur_tx % NUM_TX_DESC;
1591 sis_priv->tx_skbuff[entry] = skb;
1592
1593 /* set the transmit buffer descriptor and enable Transmit State Machine */
1594 sis_priv->tx_ring[entry].bufptr = pci_map_single(sis_priv->pci_dev,
1595 skb->data, skb->len, PCI_DMA_TODEVICE);
1596 sis_priv->tx_ring[entry].cmdsts = (OWN | skb->len);
1597 outl(TxENA | inl(ioaddr + cr), ioaddr + cr);
1598
1599 sis_priv->cur_tx ++;
1600 index_cur_tx = sis_priv->cur_tx;
1601 index_dirty_tx = sis_priv->dirty_tx;
1602
1603 for (count_dirty_tx = 0; index_cur_tx != index_dirty_tx; index_dirty_tx++)
1604 count_dirty_tx ++;
1605
1606 if (index_cur_tx == index_dirty_tx) {
1607 /* dirty_tx is met in the cycle of cur_tx, buffer full */
1608 sis_priv->tx_full = 1;
1609 netif_stop_queue(net_dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001610 } else if (count_dirty_tx < NUM_TX_DESC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 /* Typical path, tell upper layer that more transmission is possible */
1612 netif_start_queue(net_dev);
1613 } else {
1614 /* buffer full, tell upper layer no more transmission */
1615 sis_priv->tx_full = 1;
1616 netif_stop_queue(net_dev);
1617 }
1618
1619 spin_unlock_irqrestore(&sis_priv->lock, flags);
1620
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 if (netif_msg_tx_queued(sis_priv))
1622 printk(KERN_DEBUG "%s: Queued Tx packet at %p size %d "
1623 "to slot %d.\n",
1624 net_dev->name, skb->data, (int)skb->len, entry);
1625
Patrick McHardy6ed10652009-06-23 06:03:08 +00001626 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627}
1628
1629/**
1630 * sis900_interrupt - sis900 interrupt handler
1631 * @irq: the irq number
1632 * @dev_instance: the client data object
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001634 * The interrupt handler does all of the Rx thread work,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 * and cleans up after the Tx thread
1636 */
1637
David Howells7d12e782006-10-05 14:55:46 +01001638static irqreturn_t sis900_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639{
1640 struct net_device *net_dev = dev_instance;
Wang Chen8f15ea42008-11-12 23:38:36 -08001641 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 int boguscnt = max_interrupt_work;
1643 long ioaddr = net_dev->base_addr;
1644 u32 status;
1645 unsigned int handled = 0;
1646
1647 spin_lock (&sis_priv->lock);
1648
1649 do {
1650 status = inl(ioaddr + isr);
1651
1652 if ((status & (HIBERR|TxURN|TxERR|TxIDLE|RxORN|RxERR|RxOK)) == 0)
1653 /* nothing intresting happened */
1654 break;
1655 handled = 1;
1656
1657 /* why dow't we break after Tx/Rx case ?? keyword: full-duplex */
1658 if (status & (RxORN | RxERR | RxOK))
1659 /* Rx interrupt */
1660 sis900_rx(net_dev);
1661
1662 if (status & (TxURN | TxERR | TxIDLE))
1663 /* Tx interrupt */
1664 sis900_finish_xmit(net_dev);
1665
1666 /* something strange happened !!! */
1667 if (status & HIBERR) {
1668 if(netif_msg_intr(sis_priv))
Joe Perches24500222007-11-19 17:48:28 -08001669 printk(KERN_INFO "%s: Abnormal interrupt, "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 "status %#8.8x.\n", net_dev->name, status);
1671 break;
1672 }
1673 if (--boguscnt < 0) {
1674 if(netif_msg_intr(sis_priv))
1675 printk(KERN_INFO "%s: Too much work at interrupt, "
1676 "interrupt status = %#8.8x.\n",
1677 net_dev->name, status);
1678 break;
1679 }
1680 } while (1);
1681
1682 if(netif_msg_intr(sis_priv))
1683 printk(KERN_DEBUG "%s: exiting interrupt, "
1684 "interrupt status = 0x%#8.8x.\n",
1685 net_dev->name, inl(ioaddr + isr));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001686
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 spin_unlock (&sis_priv->lock);
1688 return IRQ_RETVAL(handled);
1689}
1690
1691/**
1692 * sis900_rx - sis900 receive routine
1693 * @net_dev: the net device which receives data
1694 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001695 * Process receive interrupt events,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 * put buffer to higher layer and refill buffer pool
Akinobu Mita0b280022006-03-26 01:38:58 -08001697 * Note: This function is called by interrupt handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 * don't do "too much" work here
1699 */
1700
1701static int sis900_rx(struct net_device *net_dev)
1702{
Wang Chen8f15ea42008-11-12 23:38:36 -08001703 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 long ioaddr = net_dev->base_addr;
1705 unsigned int entry = sis_priv->cur_rx % NUM_RX_DESC;
1706 u32 rx_status = sis_priv->rx_ring[entry].cmdsts;
Vasily Averin7380a78a2005-10-28 16:46:35 -04001707 int rx_work_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708
1709 if (netif_msg_rx_status(sis_priv))
1710 printk(KERN_DEBUG "sis900_rx, cur_rx:%4.4d, dirty_rx:%4.4d "
1711 "status:0x%8.8x\n",
1712 sis_priv->cur_rx, sis_priv->dirty_rx, rx_status);
Vasily Averin7380a78a2005-10-28 16:46:35 -04001713 rx_work_limit = sis_priv->dirty_rx + NUM_RX_DESC - sis_priv->cur_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714
1715 while (rx_status & OWN) {
1716 unsigned int rx_size;
Daniele Venzanod269a692006-04-17 10:28:06 +02001717 unsigned int data_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718
Vasily Averin7380a78a2005-10-28 16:46:35 -04001719 if (--rx_work_limit < 0)
1720 break;
1721
Daniele Venzanod269a692006-04-17 10:28:06 +02001722 data_size = rx_status & DSIZE;
1723 rx_size = data_size - CRC_SIZE;
1724
1725#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1726 /* ``TOOLONG'' flag means jumbo packet recived. */
1727 if ((rx_status & TOOLONG) && data_size <= MAX_FRAME_SIZE)
1728 rx_status &= (~ ((unsigned int)TOOLONG));
1729#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730
1731 if (rx_status & (ABORT|OVERRUN|TOOLONG|RUNT|RXISERR|CRCERR|FAERR)) {
1732 /* corrupted packet received */
1733 if (netif_msg_rx_err(sis_priv))
1734 printk(KERN_DEBUG "%s: Corrupted packet "
Daniele Venzanod269a692006-04-17 10:28:06 +02001735 "received, buffer status = 0x%8.8x/%d.\n",
1736 net_dev->name, rx_status, data_size);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001737 net_dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 if (rx_status & OVERRUN)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001739 net_dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 if (rx_status & (TOOLONG|RUNT))
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001741 net_dev->stats.rx_length_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 if (rx_status & (RXISERR | FAERR))
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001743 net_dev->stats.rx_frame_errors++;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001744 if (rx_status & CRCERR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001745 net_dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 /* reset buffer descriptor state */
1747 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1748 } else {
1749 struct sk_buff * skb;
Neil Hormandc5a1442007-04-26 13:47:36 -04001750 struct sk_buff * rx_skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751
Neil Hormanb748d9e2007-04-20 09:54:58 -04001752 pci_unmap_single(sis_priv->pci_dev,
1753 sis_priv->rx_ring[entry].bufptr, RX_BUF_SIZE,
1754 PCI_DMA_FROMDEVICE);
1755
André Goddard Rosaaf901ca2009-11-14 13:09:05 -02001756 /* refill the Rx buffer, what if there is not enough
Neil Hormanb748d9e2007-04-20 09:54:58 -04001757 * memory for new socket buffer ?? */
1758 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1759 /*
1760 * Not enough memory to refill the buffer
1761 * so we need to recycle the old one so
1762 * as to avoid creating a memory hole
1763 * in the rx ring
1764 */
1765 skb = sis_priv->rx_skbuff[entry];
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001766 net_dev->stats.rx_dropped++;
Neil Hormanb748d9e2007-04-20 09:54:58 -04001767 goto refill_rx_ring;
Jeff Garzik7d2e3cb2008-05-13 01:41:58 -04001768 }
Neil Hormanb748d9e2007-04-20 09:54:58 -04001769
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 /* This situation should never happen, but due to
André Goddard Rosaaf901ca2009-11-14 13:09:05 -02001771 some unknown bugs, it is possible that
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 we are working on NULL sk_buff :-( */
1773 if (sis_priv->rx_skbuff[entry] == NULL) {
1774 if (netif_msg_rx_err(sis_priv))
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001775 printk(KERN_WARNING "%s: NULL pointer "
Vasily Averin7380a78a2005-10-28 16:46:35 -04001776 "encountered in Rx ring\n"
1777 "cur_rx:%4.4d, dirty_rx:%4.4d\n",
1778 net_dev->name, sis_priv->cur_rx,
1779 sis_priv->dirty_rx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 break;
1781 }
1782
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 /* give the socket buffer to upper layers */
Neil Hormandc5a1442007-04-26 13:47:36 -04001784 rx_skb = sis_priv->rx_skbuff[entry];
1785 skb_put(rx_skb, rx_size);
1786 rx_skb->protocol = eth_type_trans(rx_skb, net_dev);
1787 netif_rx(rx_skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788
1789 /* some network statistics */
1790 if ((rx_status & BCAST) == MCAST)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001791 net_dev->stats.multicast++;
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001792 net_dev->stats.rx_bytes += rx_size;
1793 net_dev->stats.rx_packets++;
Neil Hormanb748d9e2007-04-20 09:54:58 -04001794 sis_priv->dirty_rx++;
1795refill_rx_ring:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 sis_priv->rx_skbuff[entry] = skb;
1797 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001798 sis_priv->rx_ring[entry].bufptr =
1799 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 }
1802 sis_priv->cur_rx++;
1803 entry = sis_priv->cur_rx % NUM_RX_DESC;
1804 rx_status = sis_priv->rx_ring[entry].cmdsts;
1805 } // while
1806
1807 /* refill the Rx buffer, what if the rate of refilling is slower
1808 * than consuming ?? */
Vasily Averin7380a78a2005-10-28 16:46:35 -04001809 for (; sis_priv->cur_rx != sis_priv->dirty_rx; sis_priv->dirty_rx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810 struct sk_buff *skb;
1811
1812 entry = sis_priv->dirty_rx % NUM_RX_DESC;
1813
1814 if (sis_priv->rx_skbuff[entry] == NULL) {
1815 if ((skb = dev_alloc_skb(RX_BUF_SIZE)) == NULL) {
1816 /* not enough memory for skbuff, this makes a
1817 * "hole" on the buffer ring, it is not clear
1818 * how the hardware will react to this kind
1819 * of degenerated buffer */
1820 if (netif_msg_rx_err(sis_priv))
Joe Perches24500222007-11-19 17:48:28 -08001821 printk(KERN_INFO "%s: Memory squeeze, "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 "deferring packet.\n",
1823 net_dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001824 net_dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 break;
1826 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 sis_priv->rx_skbuff[entry] = skb;
1828 sis_priv->rx_ring[entry].cmdsts = RX_BUF_SIZE;
1829 sis_priv->rx_ring[entry].bufptr =
David S. Miller689be432005-06-28 15:25:31 -07001830 pci_map_single(sis_priv->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1832 }
1833 }
1834 /* re-enable the potentially idle receive state matchine */
1835 outl(RxENA | inl(ioaddr + cr), ioaddr + cr );
1836
1837 return 0;
1838}
1839
1840/**
1841 * sis900_finish_xmit - finish up transmission of packets
1842 * @net_dev: the net device to be transmitted on
1843 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001844 * Check for error condition and free socket buffer etc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 * schedule for more transmission as needed
Akinobu Mita0b280022006-03-26 01:38:58 -08001846 * Note: This function is called by interrupt handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 * don't do "too much" work here
1848 */
1849
1850static void sis900_finish_xmit (struct net_device *net_dev)
1851{
Wang Chen8f15ea42008-11-12 23:38:36 -08001852 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
1854 for (; sis_priv->dirty_tx != sis_priv->cur_tx; sis_priv->dirty_tx++) {
1855 struct sk_buff *skb;
1856 unsigned int entry;
1857 u32 tx_status;
1858
1859 entry = sis_priv->dirty_tx % NUM_TX_DESC;
1860 tx_status = sis_priv->tx_ring[entry].cmdsts;
1861
1862 if (tx_status & OWN) {
1863 /* The packet is not transmitted yet (owned by hardware) !
1864 * Note: the interrupt is generated only when Tx Machine
1865 * is idle, so this is an almost impossible case */
1866 break;
1867 }
1868
1869 if (tx_status & (ABORT | UNDERRUN | OWCOLL)) {
1870 /* packet unsuccessfully transmitted */
1871 if (netif_msg_tx_err(sis_priv))
1872 printk(KERN_DEBUG "%s: Transmit "
1873 "error, Tx status %8.8x.\n",
1874 net_dev->name, tx_status);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001875 net_dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 if (tx_status & UNDERRUN)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001877 net_dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 if (tx_status & ABORT)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001879 net_dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 if (tx_status & NOCARRIER)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001881 net_dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 if (tx_status & OWCOLL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001883 net_dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 } else {
1885 /* packet successfully transmitted */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001886 net_dev->stats.collisions += (tx_status & COLCNT) >> 16;
1887 net_dev->stats.tx_bytes += tx_status & DSIZE;
1888 net_dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 }
1890 /* Free the original skb. */
1891 skb = sis_priv->tx_skbuff[entry];
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001892 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 sis_priv->tx_ring[entry].bufptr, skb->len,
1894 PCI_DMA_TODEVICE);
1895 dev_kfree_skb_irq(skb);
1896 sis_priv->tx_skbuff[entry] = NULL;
1897 sis_priv->tx_ring[entry].bufptr = 0;
1898 sis_priv->tx_ring[entry].cmdsts = 0;
1899 }
1900
1901 if (sis_priv->tx_full && netif_queue_stopped(net_dev) &&
1902 sis_priv->cur_tx - sis_priv->dirty_tx < NUM_TX_DESC - 4) {
1903 /* The ring is no longer full, clear tx_full and schedule
1904 * more transmission by netif_wake_queue(net_dev) */
1905 sis_priv->tx_full = 0;
1906 netif_wake_queue (net_dev);
1907 }
1908}
1909
1910/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001911 * sis900_close - close sis900 device
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 * @net_dev: the net device to be closed
1913 *
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001914 * Disable interrupts, stop the Tx and Rx Status Machine
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 * free Tx and RX socket buffer
1916 */
1917
1918static int sis900_close(struct net_device *net_dev)
1919{
1920 long ioaddr = net_dev->base_addr;
Wang Chen8f15ea42008-11-12 23:38:36 -08001921 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 struct sk_buff *skb;
1923 int i;
1924
1925 netif_stop_queue(net_dev);
1926
1927 /* Disable interrupts by clearing the interrupt mask. */
1928 outl(0x0000, ioaddr + imr);
1929 outl(0x0000, ioaddr + ier);
1930
1931 /* Stop the chip's Tx and Rx Status Machine */
1932 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
1933
1934 del_timer(&sis_priv->timer);
1935
1936 free_irq(net_dev->irq, net_dev);
1937
1938 /* Free Tx and RX skbuff */
1939 for (i = 0; i < NUM_RX_DESC; i++) {
1940 skb = sis_priv->rx_skbuff[i];
1941 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001942 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 sis_priv->rx_ring[i].bufptr,
1944 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1945 dev_kfree_skb(skb);
1946 sis_priv->rx_skbuff[i] = NULL;
1947 }
1948 }
1949 for (i = 0; i < NUM_TX_DESC; i++) {
1950 skb = sis_priv->tx_skbuff[i];
1951 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001952 pci_unmap_single(sis_priv->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 sis_priv->tx_ring[i].bufptr, skb->len,
1954 PCI_DMA_TODEVICE);
1955 dev_kfree_skb(skb);
1956 sis_priv->tx_skbuff[i] = NULL;
1957 }
1958 }
1959
1960 /* Green! Put the chip in low-power mode. */
1961
1962 return 0;
1963}
1964
1965/**
1966 * sis900_get_drvinfo - Return information about driver
1967 * @net_dev: the net device to probe
1968 * @info: container for info returned
1969 *
1970 * Process ethtool command such as "ehtool -i" to show information
1971 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001972
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973static void sis900_get_drvinfo(struct net_device *net_dev,
1974 struct ethtool_drvinfo *info)
1975{
Wang Chen8f15ea42008-11-12 23:38:36 -08001976 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977
1978 strcpy (info->driver, SIS900_MODULE_NAME);
1979 strcpy (info->version, SIS900_DRV_VERSION);
1980 strcpy (info->bus_info, pci_name(sis_priv->pci_dev));
1981}
1982
1983static u32 sis900_get_msglevel(struct net_device *net_dev)
1984{
Wang Chen8f15ea42008-11-12 23:38:36 -08001985 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986 return sis_priv->msg_enable;
1987}
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001988
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989static void sis900_set_msglevel(struct net_device *net_dev, u32 value)
1990{
Wang Chen8f15ea42008-11-12 23:38:36 -08001991 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 sis_priv->msg_enable = value;
1993}
1994
Daniele Venzanoda369b02005-05-12 20:13:14 -04001995static u32 sis900_get_link(struct net_device *net_dev)
1996{
Wang Chen8f15ea42008-11-12 23:38:36 -08001997 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04001998 return mii_link_ok(&sis_priv->mii_info);
1999}
2000
2001static int sis900_get_settings(struct net_device *net_dev,
2002 struct ethtool_cmd *cmd)
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 spin_lock_irq(&sis_priv->lock);
2006 mii_ethtool_gset(&sis_priv->mii_info, cmd);
2007 spin_unlock_irq(&sis_priv->lock);
2008 return 0;
2009}
2010
2011static int sis900_set_settings(struct net_device *net_dev,
2012 struct ethtool_cmd *cmd)
2013{
Wang Chen8f15ea42008-11-12 23:38:36 -08002014 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002015 int rt;
2016 spin_lock_irq(&sis_priv->lock);
2017 rt = mii_ethtool_sset(&sis_priv->mii_info, cmd);
2018 spin_unlock_irq(&sis_priv->lock);
2019 return rt;
2020}
2021
2022static int sis900_nway_reset(struct net_device *net_dev)
2023{
Wang Chen8f15ea42008-11-12 23:38:36 -08002024 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoda369b02005-05-12 20:13:14 -04002025 return mii_nway_restart(&sis_priv->mii_info);
2026}
2027
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002028/**
2029 * sis900_set_wol - Set up Wake on Lan registers
2030 * @net_dev: the net device to probe
2031 * @wol: container for info passed to the driver
2032 *
2033 * Process ethtool command "wol" to setup wake on lan features.
2034 * SiS900 supports sending WoL events if a correct packet is received,
2035 * but there is no simple way to filter them to only a subset (broadcast,
2036 * multicast, unicast or arp).
2037 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002038
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002039static int sis900_set_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2040{
Wang Chen8f15ea42008-11-12 23:38:36 -08002041 struct sis900_private *sis_priv = netdev_priv(net_dev);
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002042 long pmctrl_addr = net_dev->base_addr + pmctrl;
2043 u32 cfgpmcsr = 0, pmctrl_bits = 0;
2044
2045 if (wol->wolopts == 0) {
2046 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
Daniele Venzano7bef4b32006-02-25 17:01:09 -05002047 cfgpmcsr &= ~PME_EN;
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002048 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2049 outl(pmctrl_bits, pmctrl_addr);
2050 if (netif_msg_wol(sis_priv))
2051 printk(KERN_DEBUG "%s: Wake on LAN disabled\n", net_dev->name);
2052 return 0;
2053 }
2054
2055 if (wol->wolopts & (WAKE_MAGICSECURE | WAKE_UCAST | WAKE_MCAST
2056 | WAKE_BCAST | WAKE_ARP))
2057 return -EINVAL;
2058
2059 if (wol->wolopts & WAKE_MAGIC)
2060 pmctrl_bits |= MAGICPKT;
2061 if (wol->wolopts & WAKE_PHY)
2062 pmctrl_bits |= LINKON;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002063
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002064 outl(pmctrl_bits, pmctrl_addr);
2065
2066 pci_read_config_dword(sis_priv->pci_dev, CFGPMCSR, &cfgpmcsr);
2067 cfgpmcsr |= PME_EN;
2068 pci_write_config_dword(sis_priv->pci_dev, CFGPMCSR, cfgpmcsr);
2069 if (netif_msg_wol(sis_priv))
2070 printk(KERN_DEBUG "%s: Wake on LAN enabled\n", net_dev->name);
2071
2072 return 0;
2073}
2074
2075static void sis900_get_wol(struct net_device *net_dev, struct ethtool_wolinfo *wol)
2076{
2077 long pmctrl_addr = net_dev->base_addr + pmctrl;
2078 u32 pmctrl_bits;
2079
2080 pmctrl_bits = inl(pmctrl_addr);
2081 if (pmctrl_bits & MAGICPKT)
2082 wol->wolopts |= WAKE_MAGIC;
2083 if (pmctrl_bits & LINKON)
2084 wol->wolopts |= WAKE_PHY;
2085
2086 wol->supported = (WAKE_PHY | WAKE_MAGIC);
2087}
2088
Jeff Garzik7282d492006-09-13 14:30:00 -04002089static const struct ethtool_ops sis900_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 .get_drvinfo = sis900_get_drvinfo,
2091 .get_msglevel = sis900_get_msglevel,
2092 .set_msglevel = sis900_set_msglevel,
Daniele Venzanoda369b02005-05-12 20:13:14 -04002093 .get_link = sis900_get_link,
2094 .get_settings = sis900_get_settings,
2095 .set_settings = sis900_set_settings,
2096 .nway_reset = sis900_nway_reset,
Daniele Venzanoea37cce2005-10-11 09:44:30 +02002097 .get_wol = sis900_get_wol,
2098 .set_wol = sis900_set_wol
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099};
2100
2101/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002102 * mii_ioctl - process MII i/o control command
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 * @net_dev: the net device to command for
2104 * @rq: parameter for command
2105 * @cmd: the i/o command
2106 *
2107 * Process MII command like read/write MII register
2108 */
2109
2110static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
2111{
Wang Chen8f15ea42008-11-12 23:38:36 -08002112 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 struct mii_ioctl_data *data = if_mii(rq);
2114
2115 switch(cmd) {
2116 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2117 data->phy_id = sis_priv->mii->phy_addr;
2118 /* Fall Through */
2119
2120 case SIOCGMIIREG: /* Read MII PHY register. */
2121 data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
2122 return 0;
2123
2124 case SIOCSMIIREG: /* Write MII PHY register. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 mdio_write(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
2126 return 0;
2127 default:
2128 return -EOPNOTSUPP;
2129 }
2130}
2131
2132/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002133 * sis900_set_config - Set media type by net_device.set_config
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 * @dev: the net device for media type change
2135 * @map: ifmap passed by ifconfig
2136 *
2137 * Set media type to 10baseT, 100baseT or 0(for auto) by ifconfig
2138 * we support only port changes. All other runtime configuration
2139 * changes will be ignored
2140 */
2141
2142static int sis900_set_config(struct net_device *dev, struct ifmap *map)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002143{
Wang Chen8f15ea42008-11-12 23:38:36 -08002144 struct sis900_private *sis_priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 struct mii_phy *mii_phy = sis_priv->mii;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002146
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 u16 status;
2148
2149 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
2150 /* we switch on the ifmap->port field. I couldn't find anything
2151 * like a definition or standard for the values of that field.
2152 * I think the meaning of those values is device specific. But
2153 * since I would like to change the media type via the ifconfig
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002154 * command I use the definition from linux/netdevice.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 * (which seems to be different from the ifport(pcmcia) definition) */
2156 switch(map->port){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002157 case IF_PORT_UNKNOWN: /* use auto here */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 dev->if_port = map->port;
2159 /* we are going to change the media type, so the Link
2160 * will be temporary down and we need to reflect that
2161 * here. When the Link comes up again, it will be
2162 * sensed by the sis_timer procedure, which also does
2163 * all the rest for us */
2164 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002165
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 /* read current state */
2167 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002168
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169 /* enable auto negotiation and reset the negotioation
2170 * (I don't really know what the auto negatiotiation
2171 * reset really means, but it sounds for me right to
2172 * do one here) */
2173 mdio_write(dev, mii_phy->phy_addr,
2174 MII_CONTROL, status | MII_CNTL_AUTO | MII_CNTL_RST_AUTO);
2175
2176 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002177
2178 case IF_PORT_10BASET: /* 10BaseT */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179 dev->if_port = map->port;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002180
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 /* we are going to change the media type, so the Link
2182 * will be temporary down and we need to reflect that
2183 * here. When the Link comes up again, it will be
2184 * sensed by the sis_timer procedure, which also does
2185 * all the rest for us */
2186 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002187
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 /* set Speed to 10Mbps */
2189 /* read current state */
2190 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002191
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 /* disable auto negotiation and force 10MBit mode*/
2193 mdio_write(dev, mii_phy->phy_addr,
2194 MII_CONTROL, status & ~(MII_CNTL_SPEED |
2195 MII_CNTL_AUTO));
2196 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002197
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 case IF_PORT_100BASET: /* 100BaseT */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002199 case IF_PORT_100BASETX: /* 100BaseTx */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 dev->if_port = map->port;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002201
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202 /* we are going to change the media type, so the Link
2203 * will be temporary down and we need to reflect that
2204 * here. When the Link comes up again, it will be
2205 * sensed by the sis_timer procedure, which also does
2206 * all the rest for us */
2207 netif_carrier_off(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002208
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 /* set Speed to 100Mbps */
2210 /* disable auto negotiation and enable 100MBit Mode */
2211 status = mdio_read(dev, mii_phy->phy_addr, MII_CONTROL);
2212 mdio_write(dev, mii_phy->phy_addr,
2213 MII_CONTROL, (status & ~MII_CNTL_SPEED) |
2214 MII_CNTL_SPEED);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002215
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002217
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 case IF_PORT_10BASE2: /* 10Base2 */
2219 case IF_PORT_AUI: /* AUI */
2220 case IF_PORT_100BASEFX: /* 100BaseFx */
2221 /* These Modes are not supported (are they?)*/
2222 return -EOPNOTSUPP;
2223 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002224
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 default:
2226 return -EINVAL;
2227 }
2228 }
2229 return 0;
2230}
2231
2232/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002233 * sis900_mcast_bitnr - compute hashtable index
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 * @addr: multicast address
2235 * @revision: revision id of chip
2236 *
2237 * SiS 900 uses the most sigificant 7 bits to index a 128 bits multicast
2238 * hash table, which makes this function a little bit different from other drivers
2239 * SiS 900 B0 & 635 M/B uses the most significat 8 bits to index 256 bits
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002240 * multicast hash table.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241 */
2242
2243static inline u16 sis900_mcast_bitnr(u8 *addr, u8 revision)
2244{
2245
2246 u32 crc = ether_crc(6, addr);
2247
2248 /* leave 8 or 7 most siginifant bits */
2249 if ((revision >= SIS635A_900_REV) || (revision == SIS900B_900_REV))
Eric Dumazet807540b2010-09-23 05:40:09 +00002250 return (int)(crc >> 24);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 else
Eric Dumazet807540b2010-09-23 05:40:09 +00002252 return (int)(crc >> 25);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253}
2254
2255/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002256 * set_rx_mode - Set SiS900 receive mode
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257 * @net_dev: the net device to be set
2258 *
2259 * Set SiS900 receive mode for promiscuous, multicast, or broadcast mode.
2260 * And set the appropriate multicast filter.
2261 * Multicast hash table changes from 128 to 256 bits for 635M/B & 900B0.
2262 */
2263
2264static void set_rx_mode(struct net_device *net_dev)
2265{
2266 long ioaddr = net_dev->base_addr;
Wang Chen8f15ea42008-11-12 23:38:36 -08002267 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002268 u16 mc_filter[16] = {0}; /* 256/128 bits multicast hash table */
2269 int i, table_entries;
2270 u32 rx_mode;
2271
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08002272 /* 635 Hash Table entries = 256(2^16) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 if((sis_priv->chipset_rev >= SIS635A_900_REV) ||
2274 (sis_priv->chipset_rev == SIS900B_900_REV))
2275 table_entries = 16;
2276 else
2277 table_entries = 8;
2278
2279 if (net_dev->flags & IFF_PROMISC) {
2280 /* Accept any kinds of packets */
2281 rx_mode = RFPromiscuous;
2282 for (i = 0; i < table_entries; i++)
2283 mc_filter[i] = 0xffff;
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00002284 } else if ((netdev_mc_count(net_dev) > multicast_filter_limit) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 (net_dev->flags & IFF_ALLMULTI)) {
2286 /* too many multicast addresses or accept all multicast packet */
2287 rx_mode = RFAAB | RFAAM;
2288 for (i = 0; i < table_entries; i++)
2289 mc_filter[i] = 0xffff;
2290 } else {
2291 /* Accept Broadcast packet, destination address matchs our
2292 * MAC address, use Receive Filter to reject unwanted MCAST
2293 * packets */
Jiri Pirko22bedad32010-04-01 21:22:57 +00002294 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 rx_mode = RFAAB;
Jiri Pirko55085902010-02-18 00:42:54 +00002296
Jiri Pirko22bedad32010-04-01 21:22:57 +00002297 netdev_for_each_mc_addr(ha, net_dev) {
2298 unsigned int bit_nr;
2299
2300 bit_nr = sis900_mcast_bitnr(ha->addr,
2301 sis_priv->chipset_rev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302 mc_filter[bit_nr >> 4] |= (1 << (bit_nr & 0xf));
2303 }
2304 }
2305
2306 /* update Multicast Hash Table in Receive Filter */
2307 for (i = 0; i < table_entries; i++) {
2308 /* why plus 0x04 ??, That makes the correct value for hash table. */
2309 outl((u32)(0x00000004+i) << RFADDR_shift, ioaddr + rfcr);
2310 outl(mc_filter[i], ioaddr + rfdr);
2311 }
2312
2313 outl(RFEN | rx_mode, ioaddr + rfcr);
2314
2315 /* sis900 is capable of looping back packets at MAC level for
2316 * debugging purpose */
2317 if (net_dev->flags & IFF_LOOPBACK) {
2318 u32 cr_saved;
2319 /* We must disable Tx/Rx before setting loopback mode */
2320 cr_saved = inl(ioaddr + cr);
2321 outl(cr_saved | TxDIS | RxDIS, ioaddr + cr);
2322 /* enable loopback */
2323 outl(inl(ioaddr + txcfg) | TxMLB, ioaddr + txcfg);
2324 outl(inl(ioaddr + rxcfg) | RxATX, ioaddr + rxcfg);
2325 /* restore cr */
2326 outl(cr_saved, ioaddr + cr);
2327 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328}
2329
2330/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002331 * sis900_reset - Reset sis900 MAC
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 * @net_dev: the net device to reset
2333 *
2334 * reset sis900 MAC and wait until finished
2335 * reset through command register
2336 * change backoff algorithm for 900B0 & 635 M/B
2337 */
2338
2339static void sis900_reset(struct net_device *net_dev)
2340{
Wang Chen8f15ea42008-11-12 23:38:36 -08002341 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342 long ioaddr = net_dev->base_addr;
2343 int i = 0;
2344 u32 status = TxRCMP | RxRCMP;
2345
2346 outl(0, ioaddr + ier);
2347 outl(0, ioaddr + imr);
2348 outl(0, ioaddr + rfcr);
2349
2350 outl(RxRESET | TxRESET | RESET | inl(ioaddr + cr), ioaddr + cr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002351
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352 /* Check that the chip has finished the reset. */
2353 while (status && (i++ < 1000)) {
2354 status ^= (inl(isr + ioaddr) & status);
2355 }
2356
2357 if( (sis_priv->chipset_rev >= SIS635A_900_REV) ||
2358 (sis_priv->chipset_rev == SIS900B_900_REV) )
2359 outl(PESEL | RND_CNT, ioaddr + cfg);
2360 else
2361 outl(PESEL, ioaddr + cfg);
2362}
2363
2364/**
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002365 * sis900_remove - Remove sis900 device
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366 * @pci_dev: the pci device to be removed
2367 *
2368 * remove and release SiS900 net device
2369 */
2370
2371static void __devexit sis900_remove(struct pci_dev *pci_dev)
2372{
2373 struct net_device *net_dev = pci_get_drvdata(pci_dev);
Wang Chen8f15ea42008-11-12 23:38:36 -08002374 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375 struct mii_phy *phy = NULL;
2376
2377 while (sis_priv->first_mii) {
2378 phy = sis_priv->first_mii;
2379 sis_priv->first_mii = phy->next;
2380 kfree(phy);
2381 }
2382
2383 pci_free_consistent(pci_dev, RX_TOTAL_SIZE, sis_priv->rx_ring,
2384 sis_priv->rx_ring_dma);
2385 pci_free_consistent(pci_dev, TX_TOTAL_SIZE, sis_priv->tx_ring,
2386 sis_priv->tx_ring_dma);
2387 unregister_netdev(net_dev);
2388 free_netdev(net_dev);
2389 pci_release_regions(pci_dev);
2390 pci_set_drvdata(pci_dev, NULL);
2391}
2392
2393#ifdef CONFIG_PM
2394
2395static int sis900_suspend(struct pci_dev *pci_dev, pm_message_t state)
2396{
2397 struct net_device *net_dev = pci_get_drvdata(pci_dev);
2398 long ioaddr = net_dev->base_addr;
2399
2400 if(!netif_running(net_dev))
2401 return 0;
2402
2403 netif_stop_queue(net_dev);
2404 netif_device_detach(net_dev);
2405
2406 /* Stop the chip's Tx and Rx Status Machine */
2407 outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
2408
2409 pci_set_power_state(pci_dev, PCI_D3hot);
2410 pci_save_state(pci_dev);
2411
2412 return 0;
2413}
2414
2415static int sis900_resume(struct pci_dev *pci_dev)
2416{
2417 struct net_device *net_dev = pci_get_drvdata(pci_dev);
Wang Chen8f15ea42008-11-12 23:38:36 -08002418 struct sis900_private *sis_priv = netdev_priv(net_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419 long ioaddr = net_dev->base_addr;
2420
2421 if(!netif_running(net_dev))
2422 return 0;
2423 pci_restore_state(pci_dev);
2424 pci_set_power_state(pci_dev, PCI_D0);
2425
2426 sis900_init_rxfilter(net_dev);
2427
2428 sis900_init_tx_ring(net_dev);
2429 sis900_init_rx_ring(net_dev);
2430
2431 set_rx_mode(net_dev);
2432
2433 netif_device_attach(net_dev);
2434 netif_start_queue(net_dev);
2435
2436 /* Workaround for EDB */
2437 sis900_set_mode(ioaddr, HW_SPEED_10_MBPS, FDX_CAPABLE_HALF_SELECTED);
2438
2439 /* Enable all known interrupts by setting the interrupt mask. */
2440 outl((RxSOVR|RxORN|RxERR|RxOK|TxURN|TxERR|TxIDLE), ioaddr + imr);
2441 outl(RxENA | inl(ioaddr + cr), ioaddr + cr);
2442 outl(IE, ioaddr + ier);
2443
2444 sis900_check_mode(net_dev, sis_priv->mii);
2445
2446 return 0;
2447}
2448#endif /* CONFIG_PM */
2449
2450static struct pci_driver sis900_pci_driver = {
2451 .name = SIS900_MODULE_NAME,
2452 .id_table = sis900_pci_tbl,
2453 .probe = sis900_probe,
2454 .remove = __devexit_p(sis900_remove),
2455#ifdef CONFIG_PM
2456 .suspend = sis900_suspend,
2457 .resume = sis900_resume,
2458#endif /* CONFIG_PM */
2459};
2460
2461static int __init sis900_init_module(void)
2462{
2463/* when a module, this is printed whether or not devices are found in probe */
2464#ifdef MODULE
2465 printk(version);
2466#endif
2467
Jeff Garzik29917622006-08-19 17:48:59 -04002468 return pci_register_driver(&sis900_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469}
2470
2471static void __exit sis900_cleanup_module(void)
2472{
2473 pci_unregister_driver(&sis900_pci_driver);
2474}
2475
2476module_init(sis900_init_module);
2477module_exit(sis900_cleanup_module);
2478