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cris build fixes: update eth_v10.c ethernet driver
[deliverable/linux.git] / drivers / net / cris / eth_v10.c
CommitLineData
1da177e4
LT		 1/* $Id: ethernet.c,v 1.31 2004/10/18 14:49:03 starvik Exp $
2 *
3 * e100net.c: A network driver for the ETRAX 100LX network controller.
4 *
5 * Copyright (c) 1998-2002 Axis Communications AB.
6 *
7 * The outline of this driver comes from skeleton.c.
8 *
9 * $Log: ethernet.c,v $
10 * Revision 1.31 2004/10/18 14:49:03 starvik
11 * Use RX interrupt as random source
12 *
13 * Revision 1.30 2004/09/29 10:44:04 starvik
14 * Enabed MAC-address output again
15 *
16 * Revision 1.29 2004/08/24 07:14:05 starvik
17 * Make use of generic MDIO interface and constants.
18 *
19 * Revision 1.28 2004/08/20 09:37:11 starvik
20 * Added support for Intel LXT972A. Creds to Randy Scarborough.
21 *
22 * Revision 1.27 2004/08/16 12:37:22 starvik
23 * Merge of Linux 2.6.8
24 *
25 * Revision 1.25 2004/06/21 10:29:57 starvik
26 * Merge of Linux 2.6.7
27 *
28 * Revision 1.23 2004/06/09 05:29:22 starvik
29 * Avoid any race where R_DMA_CH1_FIRST is NULL (may trigger cache bug).
30 *
31 * Revision 1.22 2004/05/14 07:58:03 starvik
32 * Merge of changes from 2.4
33 *
34 * Revision 1.20 2004/03/11 11:38:40 starvik
35 * Merge of Linux 2.6.4
36 *
37 * Revision 1.18 2003/12/03 13:45:46 starvik
38 * Use hardware pad for short packets to prevent information leakage.
39 *
40 * Revision 1.17 2003/07/04 08:27:37 starvik
41 * Merge of Linux 2.5.74
42 *
43 * Revision 1.16 2003/04/24 08:28:22 starvik
44 * New LED behaviour: LED off when no link
45 *
46 * Revision 1.15 2003/04/09 05:20:47 starvik
47 * Merge of Linux 2.5.67
48 *
49 * Revision 1.13 2003/03/06 16:11:01 henriken
50 * Off by one error in group address register setting.
51 *
52 * Revision 1.12 2003/02/27 17:24:19 starvik
53 * Corrected Rev to Revision
54 *
55 * Revision 1.11 2003/01/24 09:53:21 starvik
56 * Oops. Initialize GA to 0, not to 1
57 *
58 * Revision 1.10 2003/01/24 09:50:55 starvik
59 * Initialize GA_0 and GA_1 to 0 to avoid matching of unwanted packets
60 *
61 * Revision 1.9 2002/12/13 07:40:58 starvik
62 * Added basic ethtool interface
63 * Handled out of memory when allocating new buffers
64 *
65 * Revision 1.8 2002/12/11 13:13:57 starvik
66 * Added arch/ to v10 specific includes
67 * Added fix from Linux 2.4 in serial.c (flush_to_flip_buffer)
68 *
69 * Revision 1.7 2002/11/26 09:41:42 starvik
70 * Added e100_set_config (standard interface to set media type)
71 * Added protection against preemptive scheduling
72 * Added standard MII ioctls
73 *
74 * Revision 1.6 2002/11/21 07:18:18 starvik
75 * Timers must be initialized in 2.5.48
76 *
77 * Revision 1.5 2002/11/20 11:56:11 starvik
78 * Merge of Linux 2.5.48
79 *
80 * Revision 1.4 2002/11/18 07:26:46 starvik
81 * Linux 2.5 port of latest Linux 2.4 ethernet driver
82 *
83 * Revision 1.33 2002/10/02 20:16:17 hp
84 * SETF, SETS: Use underscored IO_x_ macros rather than incorrect token concatenation
85 *
86 * Revision 1.32 2002/09/16 06:05:58 starvik
87 * Align memory returned by dev_alloc_skb
88 * Moved handling of sent packets to interrupt to avoid reference counting problem
89 *
90 * Revision 1.31 2002/09/10 13:28:23 larsv
91 * Return -EINVAL for unknown ioctls to avoid confusing tools that tests
92 * for supported functionality by issuing special ioctls, i.e. wireless
93 * extensions.
94 *
95 * Revision 1.30 2002/05/07 18:50:08 johana
96 * Correct spelling in comments.
97 *
98 * Revision 1.29 2002/05/06 05:38:49 starvik
99 * Performance improvements:
100 * Large packets are not copied (breakpoint set to 256 bytes)
101 * The cache bug workaround is delayed until half of the receive list
102 * has been used
103 * Added transmit list
104 * Transmit interrupts are only enabled when transmit queue is full
105 *
106 * Revision 1.28.2.1 2002/04/30 08:15:51 starvik
107 * Performance improvements:
108 * Large packets are not copied (breakpoint set to 256 bytes)
109 * The cache bug workaround is delayed until half of the receive list
110 * has been used.
111 * Added transmit list
112 * Transmit interrupts are only enabled when transmit queue is full
113 *
114 * Revision 1.28 2002/04/22 11:47:21 johana
115 * Fix according to 2.4.19-pre7. time_after/time_before and
116 * missing end of comment.
117 * The patch has a typo for ethernet.c in e100_clear_network_leds(),
118 * that is fixed here.
119 *
120 * Revision 1.27 2002/04/12 11:55:11 bjornw
121 * Added TODO
122 *
123 * Revision 1.26 2002/03/15 17:11:02 bjornw
124 * Use prepare_rx_descriptor after the CPU has touched the receiving descs
125 *
126 * Revision 1.25 2002/03/08 13:07:53 bjornw
127 * Unnecessary spinlock removed
128 *
129 * Revision 1.24 2002/02/20 12:57:43 fredriks
130 * Replaced MIN() with min().
131 *
132 * Revision 1.23 2002/02/20 10:58:14 fredriks
133 * Strip the Ethernet checksum (4 bytes) before forwarding a frame to upper layers.
134 *
135 * Revision 1.22 2002/01/30 07:48:22 matsfg
136 * Initiate R_NETWORK_TR_CTRL
137 *
138 * Revision 1.21 2001/11/23 11:54:49 starvik
139 * Added IFF_PROMISC and IFF_ALLMULTI handling in set_multicast_list
140 * Removed compiler warnings
141 *
142 * Revision 1.20 2001/11/12 19:26:00 pkj
143 * * Corrected e100_negotiate() to not assign half to current_duplex when
144 * it was supposed to compare them...
145 * * Cleaned up failure handling in e100_open().
146 * * Fixed compiler warnings.
147 *
148 * Revision 1.19 2001/11/09 07:43:09 starvik
149 * Added full duplex support
150 * Added ioctl to set speed and duplex
151 * Clear LED timer only runs when LED is lit
152 *
153 * Revision 1.18 2001/10/03 14:40:43 jonashg
154 * Update rx_bytes counter.
155 *
156 * Revision 1.17 2001/06/11 12:43:46 olof
157 * Modified defines for network LED behavior
158 *
159 * Revision 1.16 2001/05/30 06:12:46 markusl
160 * TxDesc.next should not be set to NULL
161 *
162 * Revision 1.15 2001/05/29 10:27:04 markusl
163 * Updated after review remarks:
164 * +Use IO_EXTRACT
165 * +Handle underrun
166 *
167 * Revision 1.14 2001/05/29 09:20:14 jonashg
168 * Use driver name on printk output so one can tell which driver that complains.
169 *
170 * Revision 1.13 2001/05/09 12:35:59 johana
171 * Use DMA_NBR and IRQ_NBR defines from dma.h and irq.h
172 *
173 * Revision 1.12 2001/04/05 11:43:11 tobiasa
174 * Check dev before panic.
175 *
176 * Revision 1.11 2001/04/04 11:21:05 markusl
177 * Updated according to review remarks
178 *
179 * Revision 1.10 2001/03/26 16:03:06 bjornw
180 * Needs linux/config.h
181 *
182 * Revision 1.9 2001/03/19 14:47:48 pkj
183 * * Make sure there is always a pause after the network LEDs are
184 * changed so they will not look constantly lit during heavy traffic.
185 * * Always use HZ when setting times relative to jiffies.
186 * * Use LED_NETWORK_SET() when setting the network LEDs.
187 *
188 * Revision 1.8 2001/02/27 13:52:48 bjornw
189 * malloc.h -> slab.h
190 *
191 * Revision 1.7 2001/02/23 13:46:38 bjornw
192 * Spellling check
193 *
194 * Revision 1.6 2001/01/26 15:21:04 starvik
195 * Don't disable interrupts while reading MDIO registers (MDIO is slow)
196 * Corrected promiscuous mode
197 * Improved deallocation of IRQs ("ifconfig eth0 down" now works)
198 *
199 * Revision 1.5 2000/11/29 17:22:22 bjornw
200 * Get rid of the udword types legacy stuff
201 *
202 * Revision 1.4 2000/11/22 16:36:09 bjornw
203 * Please marketing by using the correct case when spelling Etrax.
204 *
205 * Revision 1.3 2000/11/21 16:43:04 bjornw
206 * Minor short->int change
207 *
208 * Revision 1.2 2000/11/08 14:27:57 bjornw
209 * 2.4 port
210 *
211 * Revision 1.1 2000/11/06 13:56:00 bjornw
212 * Verbatim copy of the 1.24 version of e100net.c from elinux
213 *
214 * Revision 1.24 2000/10/04 15:55:23 bjornw
215 * * Use virt_to_phys etc. for DMA addresses
216 * * Removed bogus CHECKSUM_UNNECESSARY
217 *
218 *
219 */
220
1da177e4
LT		 221
222#include <linux/module.h>
223
224#include <linux/kernel.h>
1da177e4
LT		 225#include <linux/delay.h>
226#include <linux/types.h>
227#include <linux/fcntl.h>
228#include <linux/interrupt.h>
229#include <linux/ptrace.h>
230#include <linux/ioport.h>
231#include <linux/in.h>
232#include <linux/slab.h>
233#include <linux/string.h>
234#include <linux/spinlock.h>
235#include <linux/errno.h>
236#include <linux/init.h>
1977f032 237#include <linux/bitops.h>
1da177e4
LT		 238
239#include <linux/if.h>
240#include <linux/mii.h>
241#include <linux/netdevice.h>
242#include <linux/etherdevice.h>
243#include <linux/skbuff.h>
244#include <linux/ethtool.h>
245
246#include <asm/arch/svinto.h>/* DMA and register descriptions */
247#include <asm/io.h> /* LED_* I/O functions */
248#include <asm/irq.h>
249#include <asm/dma.h>
250#include <asm/system.h>
1da177e4
LT		 251#include <asm/ethernet.h>
252#include <asm/cache.h>
bafef0ae 253#include <asm/arch/io_interface_mux.h>
1da177e4
LT		 254
255//#define ETHDEBUG
256#define D(x)
257
258/*
259 * The name of the card. Is used for messages and in the requests for
260 * io regions, irqs and dma channels
261 */
262
263static const char* cardname = "ETRAX 100LX built-in ethernet controller";
264
265/* A default ethernet address. Highlevel SW will set the real one later */
266
267static struct sockaddr default_mac = {
268 0,
269 { 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 }
270};
271
272/* Information that need to be kept for each board. */
273struct net_local {
274 struct net_device_stats stats;
275 struct mii_if_info mii_if;
276
277 /* Tx control lock. This protects the transmit buffer ring
278 * state along with the "tx full" state of the driver. This
279 * means all netif_queue flow control actions are protected
280 * by this lock as well.
281 */
282 spinlock_t lock;
bafef0ae
JN		 283
284 spinlock_t led_lock; /* Protect LED state */
285 spinlock_t transceiver_lock; /* Protect transceiver state. */
1da177e4
LT		 286};
287
288typedef struct etrax_eth_descr
289{
290 etrax_dma_descr descr;
291 struct sk_buff* skb;
292} etrax_eth_descr;
293
294/* Some transceivers requires special handling */
295struct transceiver_ops
296{
297 unsigned int oui;
298 void (*check_speed)(struct net_device* dev);
299 void (*check_duplex)(struct net_device* dev);
300};
301
1da177e4
LT		 302/* Duplex settings */
303enum duplex
304{
305 half,
306 full,
307 autoneg
308};
309
310/* Dma descriptors etc. */
311
bafef0ae 312#define MAX_MEDIA_DATA_SIZE 1522
1da177e4
LT		 313
314#define MIN_PACKET_LEN 46
315#define ETHER_HEAD_LEN 14
316
317/*
318** MDIO constants.
319*/
320#define MDIO_START 0x1
321#define MDIO_READ 0x2
322#define MDIO_WRITE 0x1
323#define MDIO_PREAMBLE 0xfffffffful
324
325/* Broadcom specific */
326#define MDIO_AUX_CTRL_STATUS_REG 0x18
327#define MDIO_BC_FULL_DUPLEX_IND 0x1
328#define MDIO_BC_SPEED 0x2
329
330/* TDK specific */
331#define MDIO_TDK_DIAGNOSTIC_REG 18
332#define MDIO_TDK_DIAGNOSTIC_RATE 0x400
333#define MDIO_TDK_DIAGNOSTIC_DPLX 0x800
334
335/*Intel LXT972A specific*/
336#define MDIO_INT_STATUS_REG_2 0x0011
bafef0ae
JN		 337#define MDIO_INT_FULL_DUPLEX_IND (1 << 9)
338#define MDIO_INT_SPEED (1 << 14)
1da177e4
LT		 339
340/* Network flash constants */
341#define NET_FLASH_TIME (HZ/50) /* 20 ms */
342#define NET_FLASH_PAUSE (HZ/100) /* 10 ms */
343#define NET_LINK_UP_CHECK_INTERVAL (2*HZ) /* 2 s */
344#define NET_DUPLEX_CHECK_INTERVAL (2*HZ) /* 2 s */
345
346#define NO_NETWORK_ACTIVITY 0
347#define NETWORK_ACTIVITY 1
348
bafef0ae
JN		 349#define NBR_OF_RX_DESC 32
350#define NBR_OF_TX_DESC 16
1da177e4
LT		 351
352/* Large packets are sent directly to upper layers while small packets are */
353/* copied (to reduce memory waste). The following constant decides the breakpoint */
354#define RX_COPYBREAK 256
355
356/* Due to a chip bug we need to flush the cache when descriptors are returned */
357/* to the DMA. To decrease performance impact we return descriptors in chunks. */
358/* The following constant determines the number of descriptors to return. */
359#define RX_QUEUE_THRESHOLD NBR_OF_RX_DESC/2
360
361#define GET_BIT(bit,val) (((val) >> (bit)) & 0x01)
362
363/* Define some macros to access ETRAX 100 registers */
364#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
365 IO_FIELD_(reg##_, field##_, val)
366#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
367 IO_STATE_(reg##_, field##_, _##val)
368
369static etrax_eth_descr *myNextRxDesc; /* Points to the next descriptor to
370 to be processed */
371static etrax_eth_descr *myLastRxDesc; /* The last processed descriptor */
1da177e4
LT		 372
373static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
374
375static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */
376static etrax_eth_descr* myLastTxDesc; /* End of send queue */
377static etrax_eth_descr* myNextTxDesc; /* Next descriptor to use */
378static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
379
380static unsigned int network_rec_config_shadow = 0;
1da177e4
LT		 381
382static unsigned int network_tr_ctrl_shadow = 0;
383
384/* Network speed indication. */
8d06afab
IM		 385static DEFINE_TIMER(speed_timer, NULL, 0, 0);
386static DEFINE_TIMER(clear_led_timer, NULL, 0, 0);
1da177e4
LT		 387static int current_speed; /* Speed read from transceiver */
388static int current_speed_selection; /* Speed selected by user */
389static unsigned long led_next_time;
390static int led_active;
391static int rx_queue_len;
392
393/* Duplex */
8d06afab 394static DEFINE_TIMER(duplex_timer, NULL, 0, 0);
1da177e4
LT		 395static int full_duplex;
396static enum duplex current_duplex;
397
398/* Index to functions, as function prototypes. */
399
400static int etrax_ethernet_init(void);
401
402static int e100_open(struct net_device *dev);
403static int e100_set_mac_address(struct net_device *dev, void *addr);
404static int e100_send_packet(struct sk_buff *skb, struct net_device *dev);
7d12e780
DH		 405static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id);
406static irqreturn_t e100nw_interrupt(int irq, void *dev_id);
1da177e4
LT		 407static void e100_rx(struct net_device *dev);
408static int e100_close(struct net_device *dev);
409static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
1da177e4
LT		 410static int e100_set_config(struct net_device* dev, struct ifmap* map);
411static void e100_tx_timeout(struct net_device *dev);
412static struct net_device_stats *e100_get_stats(struct net_device *dev);
413static void set_multicast_list(struct net_device *dev);
bafef0ae 414static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
1da177e4
LT		 415static void update_rx_stats(struct net_device_stats *);
416static void update_tx_stats(struct net_device_stats *);
417static int e100_probe_transceiver(struct net_device* dev);
418
419static void e100_check_speed(unsigned long priv);
420static void e100_set_speed(struct net_device* dev, unsigned long speed);
421static void e100_check_duplex(unsigned long priv);
422static void e100_set_duplex(struct net_device* dev, enum duplex);
423static void e100_negotiate(struct net_device* dev);
424
425static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location);
426static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value);
427
428static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd);
429static void e100_send_mdio_bit(unsigned char bit);
430static unsigned char e100_receive_mdio_bit(void);
431static void e100_reset_transceiver(struct net_device* net);
432
433static void e100_clear_network_leds(unsigned long dummy);
434static void e100_set_network_leds(int active);
435
7282d491 436static const struct ethtool_ops e100_ethtool_ops;
bafef0ae
JN		 437#if defined(CONFIG_ETRAX_NO_PHY)
438static void dummy_check_speed(struct net_device* dev);
439static void dummy_check_duplex(struct net_device* dev);
440#else
1da177e4
LT		 441static void broadcom_check_speed(struct net_device* dev);
442static void broadcom_check_duplex(struct net_device* dev);
443static void tdk_check_speed(struct net_device* dev);
444static void tdk_check_duplex(struct net_device* dev);
445static void intel_check_speed(struct net_device* dev);
446static void intel_check_duplex(struct net_device* dev);
447static void generic_check_speed(struct net_device* dev);
448static void generic_check_duplex(struct net_device* dev);
bafef0ae
JN		 449#endif
450#ifdef CONFIG_NET_POLL_CONTROLLER
451static void e100_netpoll(struct net_device* dev);
452#endif
453
454static int autoneg_normal = 1;
1da177e4
LT		 455
456struct transceiver_ops transceivers[] =
457{
bafef0ae
JN		 458#if defined(CONFIG_ETRAX_NO_PHY)
459 {0x0000, dummy_check_speed, dummy_check_duplex} /* Dummy */
460#else
1da177e4
LT		 461 {0x1018, broadcom_check_speed, broadcom_check_duplex}, /* Broadcom */
462 {0xC039, tdk_check_speed, tdk_check_duplex}, /* TDK 2120 */
463 {0x039C, tdk_check_speed, tdk_check_duplex}, /* TDK 2120C */
464 {0x04de, intel_check_speed, intel_check_duplex}, /* Intel LXT972A*/
465 {0x0000, generic_check_speed, generic_check_duplex} /* Generic, must be last */
bafef0ae 466#endif
1da177e4
LT		 467};
468
bafef0ae
JN		 469struct transceiver_ops* transceiver = &transceivers[0];
470
1da177e4
LT		 471#define tx_done(dev) (*R_DMA_CH0_CMD == 0)
472
473/*
474 * Check for a network adaptor of this type, and return '0' if one exists.
475 * If dev->base_addr == 0, probe all likely locations.
476 * If dev->base_addr == 1, always return failure.
477 * If dev->base_addr == 2, allocate space for the device and return success
478 * (detachable devices only).
479 */
480
481static int __init
482etrax_ethernet_init(void)
483{
484 struct net_device *dev;
485 struct net_local* np;
486 int i, err;
487
488 printk(KERN_INFO
bafef0ae 489 "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2007 Axis Communications AB\n");
1da177e4 490
bafef0ae
JN		 491 if (cris_request_io_interface(if_eth, cardname)) {
492 printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
493 return -EBUSY;
494 }
1da177e4 495
bafef0ae 496 dev = alloc_etherdev(sizeof(struct net_local));
1da177e4
LT		 497 if (!dev)
498 return -ENOMEM;
499
bafef0ae
JN		 500 np = netdev_priv(dev);
501
502 /* we do our own locking */
503 dev->features |= NETIF_F_LLTX;
504
1da177e4
LT		 505 dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
506
507 /* now setup our etrax specific stuff */
508
509 dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */
510 dev->dma = NETWORK_RX_DMA_NBR;
511
512 /* fill in our handlers so the network layer can talk to us in the future */
513
514 dev->open = e100_open;
515 dev->hard_start_xmit = e100_send_packet;
516 dev->stop = e100_close;
517 dev->get_stats = e100_get_stats;
518 dev->set_multicast_list = set_multicast_list;
519 dev->set_mac_address = e100_set_mac_address;
76f2b4d9 520 dev->ethtool_ops = &e100_ethtool_ops;
1da177e4
LT		 521 dev->do_ioctl = e100_ioctl;
522 dev->set_config = e100_set_config;
523 dev->tx_timeout = e100_tx_timeout;
bafef0ae
JN		 524#ifdef CONFIG_NET_POLL_CONTROLLER
525 dev->poll_controller = e100_netpoll;
526#endif
527
528 spin_lock_init(&np->lock);
529 spin_lock_init(&np->led_lock);
530 spin_lock_init(&np->transceiver_lock);
1da177e4
LT		 531
532 /* Initialise the list of Etrax DMA-descriptors */
533
534 /* Initialise receive descriptors */
535
536 for (i = 0; i < NBR_OF_RX_DESC; i++) {
bafef0ae
JN		 537 /* Allocate two extra cachelines to make sure that buffer used
538 * by DMA does not share cacheline with any other data (to
539 * avoid cache bug)
1da177e4
LT		 540 */
541 RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
92b1f905
DR		 542 if (!RxDescList[i].skb)
543 return -ENOMEM;
1da177e4
LT		 544 RxDescList[i].descr.ctrl = 0;
545 RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
546 RxDescList[i].descr.next = virt_to_phys(&RxDescList[i + 1]);
547 RxDescList[i].descr.buf = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
548 RxDescList[i].descr.status = 0;
549 RxDescList[i].descr.hw_len = 0;
550 prepare_rx_descriptor(&RxDescList[i].descr);
551 }
552
553 RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl = d_eol;
554 RxDescList[NBR_OF_RX_DESC - 1].descr.next = virt_to_phys(&RxDescList[0]);
555 rx_queue_len = 0;
556
557 /* Initialize transmit descriptors */
558 for (i = 0; i < NBR_OF_TX_DESC; i++) {
559 TxDescList[i].descr.ctrl = 0;
560 TxDescList[i].descr.sw_len = 0;
561 TxDescList[i].descr.next = virt_to_phys(&TxDescList[i + 1].descr);
562 TxDescList[i].descr.buf = 0;
563 TxDescList[i].descr.status = 0;
564 TxDescList[i].descr.hw_len = 0;
565 TxDescList[i].skb = 0;
566 }
567
568 TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl = d_eol;
569 TxDescList[NBR_OF_TX_DESC - 1].descr.next = virt_to_phys(&TxDescList[0].descr);
570
571 /* Initialise initial pointers */
572
573 myNextRxDesc = &RxDescList[0];
574 myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
1da177e4
LT		 575 myFirstTxDesc = &TxDescList[0];
576 myNextTxDesc = &TxDescList[0];
577 myLastTxDesc = &TxDescList[NBR_OF_TX_DESC - 1];
578
579 /* Register device */
580 err = register_netdev(dev);
581 if (err) {
582 free_netdev(dev);
583 return err;
584 }
585
586 /* set the default MAC address */
587
588 e100_set_mac_address(dev, &default_mac);
589
590 /* Initialize speed indicator stuff. */
591
592 current_speed = 10;
593 current_speed_selection = 0; /* Auto */
594 speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
bafef0ae 595 speed_timer.data = (unsigned long)dev;
1da177e4
LT		 596 speed_timer.function = e100_check_speed;
597
598 clear_led_timer.function = e100_clear_network_leds;
bafef0ae 599 clear_led_timer.data = (unsigned long)dev;
1da177e4
LT		 600
601 full_duplex = 0;
602 current_duplex = autoneg;
603 duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
604 duplex_timer.data = (unsigned long)dev;
605 duplex_timer.function = e100_check_duplex;
606
607 /* Initialize mii interface */
1da177e4
LT		 608 np->mii_if.phy_id_mask = 0x1f;
609 np->mii_if.reg_num_mask = 0x1f;
610 np->mii_if.dev = dev;
611 np->mii_if.mdio_read = e100_get_mdio_reg;
612 np->mii_if.mdio_write = e100_set_mdio_reg;
613
614 /* Initialize group address registers to make sure that no */
615 /* unwanted addresses are matched */
616 *R_NETWORK_GA_0 = 0x00000000;
617 *R_NETWORK_GA_1 = 0x00000000;
bafef0ae
JN		 618
619 /* Initialize next time the led can flash */
620 led_next_time = jiffies;
1da177e4
LT		 621 return 0;
622}
623
624/* set MAC address of the interface. called from the core after a
625 * SIOCSIFADDR ioctl, and from the bootup above.
626 */
627
628static int
629e100_set_mac_address(struct net_device *dev, void *p)
630{
bafef0ae 631 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 632 struct sockaddr *addr = p;
633 int i;
634
635 spin_lock(&np->lock); /* preemption protection */
636
637 /* remember it */
638
639 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
640
641 /* Write it to the hardware.
642 * Note the way the address is wrapped:
643 * *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
644 * *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8);
645 */
646
647 *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
648 (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
649 *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
650 *R_NETWORK_SA_2 = 0;
651
652 /* show it in the log as well */
653
0795af57
JP		 654 printk(KERN_INFO "%s: changed MAC to %s\n",
655 dev->name, print_mac(mac, dev->dev_addr));
1da177e4
LT		 656
657 spin_unlock(&np->lock);
658
659 return 0;
660}
661
662/*
663 * Open/initialize the board. This is called (in the current kernel)
664 * sometime after booting when the 'ifconfig' program is run.
665 *
666 * This routine should set everything up anew at each open, even
667 * registers that "should" only need to be set once at boot, so that
668 * there is non-reboot way to recover if something goes wrong.
669 */
670
671static int
672e100_open(struct net_device *dev)
673{
674 unsigned long flags;
675
676 /* enable the MDIO output pin */
677
678 *R_NETWORK_MGM_CTRL = IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable);
679
680 *R_IRQ_MASK0_CLR =
681 IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
682 IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
683 IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
684
685 /* clear dma0 and 1 eop and descr irq masks */
686 *R_IRQ_MASK2_CLR =
687 IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
688 IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
689 IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
690 IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
691
692 /* Reset and wait for the DMA channels */
693
694 RESET_DMA(NETWORK_TX_DMA_NBR);
695 RESET_DMA(NETWORK_RX_DMA_NBR);
696 WAIT_DMA(NETWORK_TX_DMA_NBR);
697 WAIT_DMA(NETWORK_RX_DMA_NBR);
698
699 /* Initialise the etrax network controller */
700
701 /* allocate the irq corresponding to the receiving DMA */
702
703 if (request_irq(NETWORK_DMA_RX_IRQ_NBR, e100rxtx_interrupt,
1fb9df5d 704 IRQF_SAMPLE_RANDOM, cardname, (void *)dev)) {
1da177e4
LT		 705 goto grace_exit0;
706 }
707
708 /* allocate the irq corresponding to the transmitting DMA */
709
710 if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0,
711 cardname, (void *)dev)) {
712 goto grace_exit1;
713 }
714
715 /* allocate the irq corresponding to the network errors etc */
716
717 if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0,
718 cardname, (void *)dev)) {
719 goto grace_exit2;
720 }
721
bafef0ae
JN		 722 /*
723 * Always allocate the DMA channels after the IRQ,
724 * and clean up on failure.
725 */
726
727 if (cris_request_dma(NETWORK_TX_DMA_NBR,
728 cardname,
729 DMA_VERBOSE_ON_ERROR,
730 dma_eth)) {
731 goto grace_exit3;
732 }
733
734 if (cris_request_dma(NETWORK_RX_DMA_NBR,
735 cardname,
736 DMA_VERBOSE_ON_ERROR,
737 dma_eth)) {
738 goto grace_exit4;
739 }
740
1da177e4
LT		 741 /* give the HW an idea of what MAC address we want */
742
743 *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
744 (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
745 *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
746 *R_NETWORK_SA_2 = 0;
747
748#if 0
749 /* use promiscuous mode for testing */
750 *R_NETWORK_GA_0 = 0xffffffff;
751 *R_NETWORK_GA_1 = 0xffffffff;
752
753 *R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */
754#else
bafef0ae 755 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, max_size, size1522);
1da177e4
LT		 756 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive);
757 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable);
758 SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
759 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
760#endif
761
762 *R_NETWORK_GEN_CONFIG =
763 IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk) |
764 IO_STATE(R_NETWORK_GEN_CONFIG, enable, on);
765
766 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
767 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, delay, none);
768 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cancel, dont);
769 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cd, enable);
770 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, retry, enable);
771 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, pad, enable);
772 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable);
773 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
774
bafef0ae 775 local_irq_save(flags);
1da177e4
LT		 776
777 /* enable the irq's for ethernet DMA */
778
779 *R_IRQ_MASK2_SET =
780 IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) |
781 IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set);
782
783 *R_IRQ_MASK0_SET =
784 IO_STATE(R_IRQ_MASK0_SET, overrun, set) |
785 IO_STATE(R_IRQ_MASK0_SET, underrun, set) |
786 IO_STATE(R_IRQ_MASK0_SET, excessive_col, set);
787
788 /* make sure the irqs are cleared */
789
790 *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
791 *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
792
793 /* make sure the rec and transmit error counters are cleared */
794
795 (void)*R_REC_COUNTERS; /* dummy read */
796 (void)*R_TR_COUNTERS; /* dummy read */
797
798 /* start the receiving DMA channel so we can receive packets from now on */
799
800 *R_DMA_CH1_FIRST = virt_to_phys(myNextRxDesc);
801 *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, start);
802
803 /* Set up transmit DMA channel so it can be restarted later */
804
805 *R_DMA_CH0_FIRST = 0;
806 *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
bafef0ae 807 netif_start_queue(dev);
1da177e4 808
bafef0ae 809 local_irq_restore(flags);
1da177e4
LT		 810
811 /* Probe for transceiver */
812 if (e100_probe_transceiver(dev))
bafef0ae 813 goto grace_exit5;
1da177e4
LT		 814
815 /* Start duplex/speed timers */
816 add_timer(&speed_timer);
817 add_timer(&duplex_timer);
818
819 /* We are now ready to accept transmit requeusts from
820 * the queueing layer of the networking.
821 */
bafef0ae 822 netif_carrier_on(dev);
1da177e4
LT		 823
824 return 0;
825
bafef0ae
JN		 826grace_exit5:
827 cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
828grace_exit4:
829 cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
1da177e4
LT		 830grace_exit3:
831 free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
832grace_exit2:
833 free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
834grace_exit1:
835 free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
836grace_exit0:
837 return -EAGAIN;
838}
839
bafef0ae
JN		 840#if defined(CONFIG_ETRAX_NO_PHY)
841static void
842dummy_check_speed(struct net_device* dev)
843{
844 current_speed = 100;
845}
846#else
1da177e4
LT		 847static void
848generic_check_speed(struct net_device* dev)
849{
850 unsigned long data;
bafef0ae
JN		 851 struct net_local *np = netdev_priv(dev);
852
853 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
1da177e4
LT		 854 if ((data & ADVERTISE_100FULL) ||
855 (data & ADVERTISE_100HALF))
856 current_speed = 100;
857 else
858 current_speed = 10;
859}
860
861static void
862tdk_check_speed(struct net_device* dev)
863{
864 unsigned long data;
bafef0ae
JN		 865 struct net_local *np = netdev_priv(dev);
866
867 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
868 MDIO_TDK_DIAGNOSTIC_REG);
1da177e4
LT		 869 current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10);
870}
871
872static void
873broadcom_check_speed(struct net_device* dev)
874{
875 unsigned long data;
bafef0ae
JN		 876 struct net_local *np = netdev_priv(dev);
877
878 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
879 MDIO_AUX_CTRL_STATUS_REG);
1da177e4
LT		 880 current_speed = (data & MDIO_BC_SPEED ? 100 : 10);
881}
882
883static void
884intel_check_speed(struct net_device* dev)
885{
886 unsigned long data;
bafef0ae
JN		 887 struct net_local *np = netdev_priv(dev);
888
889 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
890 MDIO_INT_STATUS_REG_2);
1da177e4
LT		 891 current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
892}
bafef0ae 893#endif
1da177e4
LT		 894static void
895e100_check_speed(unsigned long priv)
896{
897 struct net_device* dev = (struct net_device*)priv;
bafef0ae 898 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 899 static int led_initiated = 0;
900 unsigned long data;
901 int old_speed = current_speed;
902
bafef0ae
JN		 903 spin_lock(&np->transceiver_lock);
904
905 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMSR);
1da177e4
LT		 906 if (!(data & BMSR_LSTATUS)) {
907 current_speed = 0;
908 } else {
909 transceiver->check_speed(dev);
910 }
911
bafef0ae 912 spin_lock(&np->led_lock);
1da177e4
LT		 913 if ((old_speed != current_speed) || !led_initiated) {
914 led_initiated = 1;
915 e100_set_network_leds(NO_NETWORK_ACTIVITY);
bafef0ae
JN		 916 if (current_speed)
917 netif_carrier_on(dev);
918 else
919 netif_carrier_off(dev);
1da177e4 920 }
bafef0ae 921 spin_unlock(&np->led_lock);
1da177e4
LT		 922
923 /* Reinitialize the timer. */
924 speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
925 add_timer(&speed_timer);
bafef0ae
JN		 926
927 spin_unlock(&np->transceiver_lock);
1da177e4
LT		 928}
929
930static void
931e100_negotiate(struct net_device* dev)
932{
bafef0ae
JN		 933 struct net_local *np = netdev_priv(dev);
934 unsigned short data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
935 MII_ADVERTISE);
1da177e4
LT		 936
937 /* Discard old speed and duplex settings */
938 data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL |
939 ADVERTISE_10HALF | ADVERTISE_10FULL);
940
941 switch (current_speed_selection) {
bafef0ae 942 case 10:
1da177e4
LT		 943 if (current_duplex == full)
944 data |= ADVERTISE_10FULL;
945 else if (current_duplex == half)
946 data |= ADVERTISE_10HALF;
947 else
948 data |= ADVERTISE_10HALF | ADVERTISE_10FULL;
949 break;
950
bafef0ae 951 case 100:
1da177e4
LT		 952 if (current_duplex == full)
953 data |= ADVERTISE_100FULL;
954 else if (current_duplex == half)
955 data |= ADVERTISE_100HALF;
956 else
957 data |= ADVERTISE_100HALF | ADVERTISE_100FULL;
958 break;
959
bafef0ae 960 case 0: /* Auto */
1da177e4
LT		 961 if (current_duplex == full)
962 data |= ADVERTISE_100FULL | ADVERTISE_10FULL;
963 else if (current_duplex == half)
964 data |= ADVERTISE_100HALF | ADVERTISE_10HALF;
965 else
966 data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
967 ADVERTISE_100HALF | ADVERTISE_100FULL;
968 break;
969
bafef0ae 970 default: /* assume autoneg speed and duplex */
1da177e4
LT		 971 data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
972 ADVERTISE_100HALF | ADVERTISE_100FULL;
bafef0ae 973 break;
1da177e4
LT		 974 }
975
bafef0ae 976 e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE, data);
1da177e4
LT		 977
978 /* Renegotiate with link partner */
bafef0ae
JN		 979 if (autoneg_normal) {
980 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
1da177e4 981 data |= BMCR_ANENABLE | BMCR_ANRESTART;
bafef0ae
JN		 982 }
983 e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR, data);
1da177e4
LT		 984}
985
986static void
987e100_set_speed(struct net_device* dev, unsigned long speed)
988{
bafef0ae
JN		 989 struct net_local *np = netdev_priv(dev);
990
991 spin_lock(&np->transceiver_lock);
1da177e4
LT		 992 if (speed != current_speed_selection) {
993 current_speed_selection = speed;
994 e100_negotiate(dev);
995 }
bafef0ae 996 spin_unlock(&np->transceiver_lock);
1da177e4
LT		 997}
998
999static void
1000e100_check_duplex(unsigned long priv)
1001{
1002 struct net_device *dev = (struct net_device *)priv;
bafef0ae
JN		 1003 struct net_local *np = netdev_priv(dev);
1004 int old_duplex;
1005
1006 spin_lock(&np->transceiver_lock);
1007 old_duplex = full_duplex;
1da177e4
LT		 1008 transceiver->check_duplex(dev);
1009 if (old_duplex != full_duplex) {
1010 /* Duplex changed */
1011 SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
1012 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1013 }
1014
1015 /* Reinitialize the timer. */
1016 duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
1017 add_timer(&duplex_timer);
1018 np->mii_if.full_duplex = full_duplex;
bafef0ae 1019 spin_unlock(&np->transceiver_lock);
1da177e4 1020}
bafef0ae
JN		 1021#if defined(CONFIG_ETRAX_NO_PHY)
1022static void
1023dummy_check_duplex(struct net_device* dev)
1024{
1025 full_duplex = 1;
1026}
1027#else
1da177e4
LT		 1028static void
1029generic_check_duplex(struct net_device* dev)
1030{
1031 unsigned long data;
bafef0ae
JN		 1032 struct net_local *np = netdev_priv(dev);
1033
1034 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
1da177e4
LT		 1035 if ((data & ADVERTISE_10FULL) ||
1036 (data & ADVERTISE_100FULL))
1037 full_duplex = 1;
1038 else
1039 full_duplex = 0;
1040}
1041
1042static void
1043tdk_check_duplex(struct net_device* dev)
1044{
1045 unsigned long data;
bafef0ae
JN		 1046 struct net_local *np = netdev_priv(dev);
1047
1048 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
1049 MDIO_TDK_DIAGNOSTIC_REG);
1da177e4
LT		 1050 full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
1051}
1052
1053static void
1054broadcom_check_duplex(struct net_device* dev)
1055{
1056 unsigned long data;
bafef0ae
JN		 1057 struct net_local *np = netdev_priv(dev);
1058
1059 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
1060 MDIO_AUX_CTRL_STATUS_REG);
1da177e4
LT		 1061 full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
1062}
1063
1064static void
1065intel_check_duplex(struct net_device* dev)
1066{
1067 unsigned long data;
bafef0ae
JN		 1068 struct net_local *np = netdev_priv(dev);
1069
1070 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
1071 MDIO_INT_STATUS_REG_2);
1da177e4
LT		 1072 full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
1073}
bafef0ae 1074#endif
1da177e4
LT		 1075static void
1076e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
1077{
bafef0ae
JN		 1078 struct net_local *np = netdev_priv(dev);
1079
1080 spin_lock(&np->transceiver_lock);
1da177e4
LT		 1081 if (new_duplex != current_duplex) {
1082 current_duplex = new_duplex;
1083 e100_negotiate(dev);
1084 }
bafef0ae 1085 spin_unlock(&np->transceiver_lock);
1da177e4
LT		 1086}
1087
1088static int
1089e100_probe_transceiver(struct net_device* dev)
1090{
bafef0ae 1091#if !defined(CONFIG_ETRAX_NO_PHY)
1da177e4
LT		 1092 unsigned int phyid_high;
1093 unsigned int phyid_low;
1094 unsigned int oui;
1095 struct transceiver_ops* ops = NULL;
bafef0ae
JN		 1096 struct net_local *np = netdev_priv(dev);
1097
1098 spin_lock(&np->transceiver_lock);
1da177e4
LT		 1099
1100 /* Probe MDIO physical address */
bafef0ae
JN		 1101 for (np->mii_if.phy_id = 0; np->mii_if.phy_id <= 31;
1102 np->mii_if.phy_id++) {
1103 if (e100_get_mdio_reg(dev,
1104 np->mii_if.phy_id, MII_BMSR) != 0xffff)
1da177e4
LT		 1105 break;
1106 }
bafef0ae 1107 if (np->mii_if.phy_id == 32)
1da177e4
LT		 1108 return -ENODEV;
1109
1110 /* Get manufacturer */
bafef0ae
JN		 1111 phyid_high = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID1);
1112 phyid_low = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID2);
1da177e4
LT		 1113 oui = (phyid_high << 6) | (phyid_low >> 10);
1114
1115 for (ops = &transceivers[0]; ops->oui; ops++) {
1116 if (ops->oui == oui)
1117 break;
1118 }
1119 transceiver = ops;
1120
bafef0ae
JN		 1121 spin_unlock(&np->transceiver_lock);
1122#endif
1da177e4
LT		 1123 return 0;
1124}
1125
1126static int
1127e100_get_mdio_reg(struct net_device *dev, int phy_id, int location)
1128{
1129 unsigned short cmd; /* Data to be sent on MDIO port */
1130 int data; /* Data read from MDIO */
1131 int bitCounter;
1132
1133 /* Start of frame, OP Code, Physical Address, Register Address */
1134 cmd = (MDIO_START << 14) | (MDIO_READ << 12) | (phy_id << 7) |
1135 (location << 2);
1136
1137 e100_send_mdio_cmd(cmd, 0);
1138
1139 data = 0;
1140
1141 /* Data... */
1142 for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
1143 data |= (e100_receive_mdio_bit() << bitCounter);
1144 }
1145
1146 return data;
1147}
1148
1149static void
1150e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value)
1151{
1152 int bitCounter;
1153 unsigned short cmd;
1154
1155 cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (phy_id << 7) |
1156 (location << 2);
1157
1158 e100_send_mdio_cmd(cmd, 1);
1159
1160 /* Data... */
1161 for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
1162 e100_send_mdio_bit(GET_BIT(bitCounter, value));
1163 }
1164
1165}
1166
1167static void
1168e100_send_mdio_cmd(unsigned short cmd, int write_cmd)
1169{
1170 int bitCounter;
1171 unsigned char data = 0x2;
1172
1173 /* Preamble */
1174 for (bitCounter = 31; bitCounter>= 0; bitCounter--)
1175 e100_send_mdio_bit(GET_BIT(bitCounter, MDIO_PREAMBLE));
1176
1177 for (bitCounter = 15; bitCounter >= 2; bitCounter--)
1178 e100_send_mdio_bit(GET_BIT(bitCounter, cmd));
1179
1180 /* Turnaround */
1181 for (bitCounter = 1; bitCounter >= 0 ; bitCounter--)
1182 if (write_cmd)
1183 e100_send_mdio_bit(GET_BIT(bitCounter, data));
1184 else
1185 e100_receive_mdio_bit();
1186}
1187
1188static void
1189e100_send_mdio_bit(unsigned char bit)
1190{
1191 *R_NETWORK_MGM_CTRL =
1192 IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1193 IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1194 udelay(1);
1195 *R_NETWORK_MGM_CTRL =
1196 IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1197 IO_MASK(R_NETWORK_MGM_CTRL, mdck) |
1198 IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1199 udelay(1);
1200}
1201
1202static unsigned char
1203e100_receive_mdio_bit()
1204{
1205 unsigned char bit;
1206 *R_NETWORK_MGM_CTRL = 0;
1207 bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT);
1208 udelay(1);
1209 *R_NETWORK_MGM_CTRL = IO_MASK(R_NETWORK_MGM_CTRL, mdck);
1210 udelay(1);
1211 return bit;
1212}
1213
1214static void
1215e100_reset_transceiver(struct net_device* dev)
1216{
bafef0ae 1217 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1218 unsigned short cmd;
1219 unsigned short data;
1220 int bitCounter;
1221
bafef0ae 1222 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
1da177e4 1223
bafef0ae 1224 cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (np->mii_if.phy_id << 7) | (MII_BMCR << 2);
1da177e4
LT		 1225
1226 e100_send_mdio_cmd(cmd, 1);
1227
1228 data |= 0x8000;
1229
1230 for (bitCounter = 15; bitCounter >= 0 ; bitCounter--) {
1231 e100_send_mdio_bit(GET_BIT(bitCounter, data));
1232 }
1233}
1234
1235/* Called by upper layers if they decide it took too long to complete
1236 * sending a packet - we need to reset and stuff.
1237 */
1238
1239static void
1240e100_tx_timeout(struct net_device *dev)
1241{
bafef0ae 1242 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1243 unsigned long flags;
1244
1245 spin_lock_irqsave(&np->lock, flags);
1246
1247 printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
1248 tx_done(dev) ? "IRQ problem" : "network cable problem");
1249
1250 /* remember we got an error */
1251
1252 np->stats.tx_errors++;
1253
1254 /* reset the TX DMA in case it has hung on something */
1255
1256 RESET_DMA(NETWORK_TX_DMA_NBR);
1257 WAIT_DMA(NETWORK_TX_DMA_NBR);
1258
1259 /* Reset the transceiver. */
1260
1261 e100_reset_transceiver(dev);
1262
1263 /* and get rid of the packets that never got an interrupt */
bafef0ae 1264 while (myFirstTxDesc != myNextTxDesc) {
1da177e4
LT		 1265 dev_kfree_skb(myFirstTxDesc->skb);
1266 myFirstTxDesc->skb = 0;
1267 myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
1268 }
1269
1270 /* Set up transmit DMA channel so it can be restarted later */
1271 *R_DMA_CH0_FIRST = 0;
1272 *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
1273
1274 /* tell the upper layers we're ok again */
1275
1276 netif_wake_queue(dev);
1277 spin_unlock_irqrestore(&np->lock, flags);
1278}
1279
1280
1281/* This will only be invoked if the driver is _not_ in XOFF state.
1282 * What this means is that we need not check it, and that this
1283 * invariant will hold if we make sure that the netif_*_queue()
1284 * calls are done at the proper times.
1285 */
1286
1287static int
1288e100_send_packet(struct sk_buff *skb, struct net_device *dev)
1289{
bafef0ae 1290 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1291 unsigned char *buf = skb->data;
1292 unsigned long flags;
1293
1294#ifdef ETHDEBUG
1295 printk("send packet len %d\n", length);
1296#endif
1297 spin_lock_irqsave(&np->lock, flags); /* protect from tx_interrupt and ourself */
1298
1299 myNextTxDesc->skb = skb;
1300
1301 dev->trans_start = jiffies;
1302
bafef0ae 1303 e100_hardware_send_packet(np, buf, skb->len);
1da177e4
LT		 1304
1305 myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next);
1306
1307 /* Stop queue if full */
1308 if (myNextTxDesc == myFirstTxDesc) {
1309 netif_stop_queue(dev);
1310 }
1311
1312 spin_unlock_irqrestore(&np->lock, flags);
1313
1314 return 0;
1315}
1316
1317/*
1318 * The typical workload of the driver:
1319 * Handle the network interface interrupts.
1320 */
1321
1322static irqreturn_t
7d12e780 1323e100rxtx_interrupt(int irq, void *dev_id)
1da177e4
LT		 1324{
1325 struct net_device *dev = (struct net_device *)dev_id;
bafef0ae
JN		 1326 struct net_local *np = netdev_priv(dev);
1327 unsigned long irqbits;
1da177e4 1328
bafef0ae
JN		 1329 /*
1330 * Note that both rx and tx interrupts are blocked at this point,
1331 * regardless of which got us here.
1332 */
1333
1334 irqbits = *R_IRQ_MASK2_RD;
1da177e4
LT		 1335
1336 /* Handle received packets */
1337 if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) {
1338 /* acknowledge the eop interrupt */
1339
1340 *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
1341
1342 /* check if one or more complete packets were indeed received */
1343
1344 while ((*R_DMA_CH1_FIRST != virt_to_phys(myNextRxDesc)) &&
1345 (myNextRxDesc != myLastRxDesc)) {
1346 /* Take out the buffer and give it to the OS, then
1347 * allocate a new buffer to put a packet in.
1348 */
1349 e100_rx(dev);
bafef0ae 1350 np->stats.rx_packets++;
1da177e4
LT		 1351 /* restart/continue on the channel, for safety */
1352 *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart);
1353 /* clear dma channel 1 eop/descr irq bits */
1354 *R_DMA_CH1_CLR_INTR =
1355 IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do) |
1356 IO_STATE(R_DMA_CH1_CLR_INTR, clr_descr, do);
1357
1358 /* now, we might have gotten another packet
1359 so we have to loop back and check if so */
1360 }
1361 }
1362
1363 /* Report any packets that have been sent */
bafef0ae
JN		 1364 while (virt_to_phys(myFirstTxDesc) != *R_DMA_CH0_FIRST &&
1365 (netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
1da177e4
LT		 1366 np->stats.tx_bytes += myFirstTxDesc->skb->len;
1367 np->stats.tx_packets++;
1368
1369 /* dma is ready with the transmission of the data in tx_skb, so now
1370 we can release the skb memory */
1371 dev_kfree_skb_irq(myFirstTxDesc->skb);
1372 myFirstTxDesc->skb = 0;
1373 myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
bafef0ae
JN		 1374 /* Wake up queue. */
1375 netif_wake_queue(dev);
1da177e4
LT		 1376 }
1377
1378 if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
bafef0ae 1379 /* acknowledge the eop interrupt. */
1da177e4 1380 *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
1da177e4
LT		 1381 }
1382
1da177e4
LT		 1383 return IRQ_HANDLED;
1384}
1385
1386static irqreturn_t
7d12e780 1387e100nw_interrupt(int irq, void *dev_id)
1da177e4
LT		 1388{
1389 struct net_device *dev = (struct net_device *)dev_id;
bafef0ae 1390 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1391 unsigned long irqbits = *R_IRQ_MASK0_RD;
1392
1393 /* check for underrun irq */
1394 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, underrun, active)) {
1395 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1396 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1397 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1398 np->stats.tx_errors++;
1399 D(printk("ethernet receiver underrun!\n"));
1400 }
1401
1402 /* check for overrun irq */
1403 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, overrun, active)) {
1404 update_rx_stats(&np->stats); /* this will ack the irq */
1405 D(printk("ethernet receiver overrun!\n"));
1406 }
1407 /* check for excessive collision irq */
1408 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, excessive_col, active)) {
1409 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1410 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1411 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1da177e4
LT		 1412 np->stats.tx_errors++;
1413 D(printk("ethernet excessive collisions!\n"));
1414 }
1415 return IRQ_HANDLED;
1416}
1417
1418/* We have a good packet(s), get it/them out of the buffers. */
1419static void
1420e100_rx(struct net_device *dev)
1421{
1422 struct sk_buff *skb;
1423 int length = 0;
bafef0ae 1424 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1425 unsigned char *skb_data_ptr;
1426#ifdef ETHDEBUG
1427 int i;
1428#endif
bafef0ae
JN		 1429 etrax_eth_descr *prevRxDesc; /* The descriptor right before myNextRxDesc */
1430 spin_lock(&np->led_lock);
1da177e4
LT		 1431 if (!led_active && time_after(jiffies, led_next_time)) {
1432 /* light the network leds depending on the current speed. */
1433 e100_set_network_leds(NETWORK_ACTIVITY);
1434
1435 /* Set the earliest time we may clear the LED */
1436 led_next_time = jiffies + NET_FLASH_TIME;
1437 led_active = 1;
1438 mod_timer(&clear_led_timer, jiffies + HZ/10);
1439 }
bafef0ae 1440 spin_unlock(&np->led_lock);
1da177e4
LT		 1441
1442 length = myNextRxDesc->descr.hw_len - 4;
bafef0ae 1443 np->stats.rx_bytes += length;
1da177e4
LT		 1444
1445#ifdef ETHDEBUG
1446 printk("Got a packet of length %d:\n", length);
1447 /* dump the first bytes in the packet */
1448 skb_data_ptr = (unsigned char *)phys_to_virt(myNextRxDesc->descr.buf);
1449 for (i = 0; i < 8; i++) {
1450 printk("%d: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", i * 8,
1451 skb_data_ptr[0],skb_data_ptr[1],skb_data_ptr[2],skb_data_ptr[3],
1452 skb_data_ptr[4],skb_data_ptr[5],skb_data_ptr[6],skb_data_ptr[7]);
1453 skb_data_ptr += 8;
1454 }
1455#endif
1456
1457 if (length < RX_COPYBREAK) {
1458 /* Small packet, copy data */
1459 skb = dev_alloc_skb(length - ETHER_HEAD_LEN);
1460 if (!skb) {
1461 np->stats.rx_errors++;
1462 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
bafef0ae 1463 goto update_nextrxdesc;
1da177e4
LT		 1464 }
1465
1466 skb_put(skb, length - ETHER_HEAD_LEN); /* allocate room for the packet body */
1467 skb_data_ptr = skb_push(skb, ETHER_HEAD_LEN); /* allocate room for the header */
1468
1469#ifdef ETHDEBUG
1470 printk("head = 0x%x, data = 0x%x, tail = 0x%x, end = 0x%x\n",
4305b541
ACM		 1471 skb->head, skb->data, skb_tail_pointer(skb),
1472 skb_end_pointer(skb));
1da177e4
LT		 1473 printk("copying packet to 0x%x.\n", skb_data_ptr);
1474#endif
1475
1476 memcpy(skb_data_ptr, phys_to_virt(myNextRxDesc->descr.buf), length);
1477 }
1478 else {
1479 /* Large packet, send directly to upper layers and allocate new
1480 * memory (aligned to cache line boundary to avoid bug).
bafef0ae
JN		 1481 * Before sending the skb to upper layers we must make sure
1482 * that skb->data points to the aligned start of the packet.
1da177e4
LT		 1483 */
1484 int align;
1485 struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
1486 if (!new_skb) {
1487 np->stats.rx_errors++;
1488 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
bafef0ae 1489 goto update_nextrxdesc;
1da177e4
LT		 1490 }
1491 skb = myNextRxDesc->skb;
1492 align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data;
1493 skb_put(skb, length + align);
1494 skb_pull(skb, align); /* Remove alignment bytes */
1495 myNextRxDesc->skb = new_skb;
1496 myNextRxDesc->descr.buf = L1_CACHE_ALIGN(virt_to_phys(myNextRxDesc->skb->data));
1497 }
1498
1da177e4
LT		 1499 skb->protocol = eth_type_trans(skb, dev);
1500
1501 /* Send the packet to the upper layers */
1502 netif_rx(skb);
1503
bafef0ae 1504 update_nextrxdesc:
1da177e4
LT		 1505 /* Prepare for next packet */
1506 myNextRxDesc->descr.status = 0;
bafef0ae 1507 prevRxDesc = myNextRxDesc;
1da177e4
LT		 1508 myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next);
1509
1510 rx_queue_len++;
1511
1512 /* Check if descriptors should be returned */
1513 if (rx_queue_len == RX_QUEUE_THRESHOLD) {
1514 flush_etrax_cache();
bafef0ae 1515 prevRxDesc->descr.ctrl |= d_eol;
1da177e4 1516 myLastRxDesc->descr.ctrl &= ~d_eol;
bafef0ae 1517 myLastRxDesc = prevRxDesc;
1da177e4
LT		 1518 rx_queue_len = 0;
1519 }
1520}
1521
1522/* The inverse routine to net_open(). */
1523static int
1524e100_close(struct net_device *dev)
1525{
bafef0ae 1526 struct net_local *np = netdev_priv(dev);
1da177e4
LT		 1527
1528 printk(KERN_INFO "Closing %s.\n", dev->name);
1529
1530 netif_stop_queue(dev);
1531
1532 *R_IRQ_MASK0_CLR =
1533 IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
1534 IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
1535 IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
1536
1537 *R_IRQ_MASK2_CLR =
1538 IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
1539 IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
1540 IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
1541 IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
1542
1543 /* Stop the receiver and the transmitter */
1544
1545 RESET_DMA(NETWORK_TX_DMA_NBR);
1546 RESET_DMA(NETWORK_RX_DMA_NBR);
1547
1548 /* Flush the Tx and disable Rx here. */
1549
1550 free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
1551 free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
1552 free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
1553
bafef0ae
JN		 1554 cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
1555 cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
1556
1da177e4
LT		 1557 /* Update the statistics here. */
1558
1559 update_rx_stats(&np->stats);
1560 update_tx_stats(&np->stats);
1561
1562 /* Stop speed/duplex timers */
1563 del_timer(&speed_timer);
1564 del_timer(&duplex_timer);
1565
1566 return 0;
1567}
1568
1569static int
1570e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1571{
1572 struct mii_ioctl_data *data = if_mii(ifr);
1573 struct net_local *np = netdev_priv(dev);
bafef0ae
JN		 1574 int rc = 0;
1575 int old_autoneg;
1da177e4
LT		 1576
1577 spin_lock(&np->lock); /* Preempt protection */
1578 switch (cmd) {
1da177e4
LT		 1579 /* The ioctls below should be considered obsolete but are */
1580 /* still present for compatability with old scripts/apps */
1581 case SET_ETH_SPEED_10: /* 10 Mbps */
1582 e100_set_speed(dev, 10);
1583 break;
1584 case SET_ETH_SPEED_100: /* 100 Mbps */
1585 e100_set_speed(dev, 100);
1586 break;
bafef0ae 1587 case SET_ETH_SPEED_AUTO: /* Auto-negotiate speed */
1da177e4
LT		 1588 e100_set_speed(dev, 0);
1589 break;
bafef0ae 1590 case SET_ETH_DUPLEX_HALF: /* Half duplex */
1da177e4
LT		 1591 e100_set_duplex(dev, half);
1592 break;
bafef0ae 1593 case SET_ETH_DUPLEX_FULL: /* Full duplex */
1da177e4
LT		 1594 e100_set_duplex(dev, full);
1595 break;
bafef0ae 1596 case SET_ETH_DUPLEX_AUTO: /* Auto-negotiate duplex */
1da177e4
LT		 1597 e100_set_duplex(dev, autoneg);
1598 break;
bafef0ae
JN		 1599 case SET_ETH_AUTONEG:
1600 old_autoneg = autoneg_normal;
1601 autoneg_normal = *(int*)data;
1602 if (autoneg_normal != old_autoneg)
1603 e100_negotiate(dev);
1604 break;
1da177e4 1605 default:
bafef0ae
JN		 1606 rc = generic_mii_ioctl(&np->mii_if, if_mii(ifr),
1607 cmd, NULL);
1608 break;
1da177e4
LT		 1609 }
1610 spin_unlock(&np->lock);
bafef0ae 1611 return rc;
1da177e4
LT		 1612}
1613
bafef0ae
JN		 1614static int e100_get_settings(struct net_device *dev,
1615 struct ethtool_cmd *cmd)
1da177e4 1616{
bafef0ae
JN		 1617 struct net_local *np = netdev_priv(dev);
1618 int err;
76f2b4d9 1619
bafef0ae
JN		 1620 spin_lock_irq(&np->lock);
1621 err = mii_ethtool_gset(&np->mii_if, cmd);
1622 spin_unlock_irq(&np->lock);
76f2b4d9 1623
bafef0ae
JN		 1624 /* The PHY may support 1000baseT, but the Etrax100 does not. */
1625 cmd->supported &= ~(SUPPORTED_1000baseT_Half
1626 | SUPPORTED_1000baseT_Full);
1627 return err;
76f2b4d9
CH		 1628}
1629
1630static int e100_set_settings(struct net_device *dev,
1631 struct ethtool_cmd *ecmd)
1632{
1633 if (ecmd->autoneg == AUTONEG_ENABLE) {
1634 e100_set_duplex(dev, autoneg);
1635 e100_set_speed(dev, 0);
1636 } else {
1637 e100_set_duplex(dev, ecmd->duplex == DUPLEX_HALF ? half : full);
1638 e100_set_speed(dev, ecmd->speed == SPEED_10 ? 10: 100);
1da177e4 1639 }
76f2b4d9
CH		 1640
1641 return 0;
1642}
1643
1644static void e100_get_drvinfo(struct net_device *dev,
1645 struct ethtool_drvinfo *info)
1646{
1647 strncpy(info->driver, "ETRAX 100LX", sizeof(info->driver) - 1);
1648 strncpy(info->version, "$Revision: 1.31 $", sizeof(info->version) - 1);
1649 strncpy(info->fw_version, "N/A", sizeof(info->fw_version) - 1);
1650 strncpy(info->bus_info, "N/A", sizeof(info->bus_info) - 1);
1651}
1652
1653static int e100_nway_reset(struct net_device *dev)
1654{
1655 if (current_duplex == autoneg && current_speed_selection == 0)
1656 e100_negotiate(dev);
1da177e4
LT		 1657 return 0;
1658}
1659
7282d491 1660static const struct ethtool_ops e100_ethtool_ops = {
76f2b4d9
CH		 1661 .get_settings = e100_get_settings,
1662 .set_settings = e100_set_settings,
1663 .get_drvinfo = e100_get_drvinfo,
1664 .nway_reset = e100_nway_reset,
1665 .get_link = ethtool_op_get_link,
1666};
1667
1da177e4
LT		 1668static int
1669e100_set_config(struct net_device *dev, struct ifmap *map)
1670{
bafef0ae
JN		 1671 struct net_local *np = netdev_priv(dev);
1672
1da177e4
LT		 1673 spin_lock(&np->lock); /* Preempt protection */
1674
1675 switch(map->port) {
1676 case IF_PORT_UNKNOWN:
1677 /* Use autoneg */
1678 e100_set_speed(dev, 0);
1679 e100_set_duplex(dev, autoneg);
1680 break;
1681 case IF_PORT_10BASET:
1682 e100_set_speed(dev, 10);
1683 e100_set_duplex(dev, autoneg);
1684 break;
1685 case IF_PORT_100BASET:
1686 case IF_PORT_100BASETX:
1687 e100_set_speed(dev, 100);
1688 e100_set_duplex(dev, autoneg);
1689 break;
1690 case IF_PORT_100BASEFX:
1691 case IF_PORT_10BASE2:
1692 case IF_PORT_AUI:
1693 spin_unlock(&np->lock);
1694 return -EOPNOTSUPP;
1695 break;
1696 default:
1697 printk(KERN_ERR "%s: Invalid media selected", dev->name);
1698 spin_unlock(&np->lock);
1699 return -EINVAL;
1700 }
1701 spin_unlock(&np->lock);
1702 return 0;
1703}
1704
1705static void
1706update_rx_stats(struct net_device_stats *es)
1707{
1708 unsigned long r = *R_REC_COUNTERS;
1709 /* update stats relevant to reception errors */
1710 es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r);
1711 es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r);
1712 es->rx_frame_errors += IO_EXTRACT(R_REC_COUNTERS, alignment_error, r);
1713 es->rx_length_errors += IO_EXTRACT(R_REC_COUNTERS, oversize, r);
1714}
1715
1716static void
1717update_tx_stats(struct net_device_stats *es)
1718{
1719 unsigned long r = *R_TR_COUNTERS;
1720 /* update stats relevant to transmission errors */
1721 es->collisions +=
1722 IO_EXTRACT(R_TR_COUNTERS, single_col, r) +
1723 IO_EXTRACT(R_TR_COUNTERS, multiple_col, r);
1da177e4
LT		 1724}
1725
1726/*
1727 * Get the current statistics.
1728 * This may be called with the card open or closed.
1729 */
1730static struct net_device_stats *
1731e100_get_stats(struct net_device *dev)
1732{
bafef0ae 1733 struct net_local *lp = netdev_priv(dev);
1da177e4 1734 unsigned long flags;
bafef0ae 1735
1da177e4
LT		 1736 spin_lock_irqsave(&lp->lock, flags);
1737
1738 update_rx_stats(&lp->stats);
1739 update_tx_stats(&lp->stats);
1740
1741 spin_unlock_irqrestore(&lp->lock, flags);
1742 return &lp->stats;
1743}
1744
1745/*
1746 * Set or clear the multicast filter for this adaptor.
1747 * num_addrs == -1 Promiscuous mode, receive all packets
1748 * num_addrs == 0 Normal mode, clear multicast list
1749 * num_addrs > 0 Multicast mode, receive normal and MC packets,
1750 * and do best-effort filtering.
1751 */
1752static void
1753set_multicast_list(struct net_device *dev)
1754{
bafef0ae 1755 struct net_local *lp = netdev_priv(dev);
1da177e4
LT		 1756 int num_addr = dev->mc_count;
1757 unsigned long int lo_bits;
1758 unsigned long int hi_bits;
bafef0ae 1759
1da177e4 1760 spin_lock(&lp->lock);
bafef0ae 1761 if (dev->flags & IFF_PROMISC) {
1da177e4
LT		 1762 /* promiscuous mode */
1763 lo_bits = 0xfffffffful;
1764 hi_bits = 0xfffffffful;
1765
1766 /* Enable individual receive */
1767 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, receive);
1768 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1769 } else if (dev->flags & IFF_ALLMULTI) {
1770 /* enable all multicasts */
1771 lo_bits = 0xfffffffful;
1772 hi_bits = 0xfffffffful;
1773
1774 /* Disable individual receive */
1775 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1776 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1777 } else if (num_addr == 0) {
1778 /* Normal, clear the mc list */
1779 lo_bits = 0x00000000ul;
1780 hi_bits = 0x00000000ul;
1781
1782 /* Disable individual receive */
1783 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1784 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1785 } else {
1786 /* MC mode, receive normal and MC packets */
1787 char hash_ix;
1788 struct dev_mc_list *dmi = dev->mc_list;
1789 int i;
1790 char *baddr;
bafef0ae 1791
1da177e4
LT		 1792 lo_bits = 0x00000000ul;
1793 hi_bits = 0x00000000ul;
bafef0ae 1794 for (i = 0; i < num_addr; i++) {
1da177e4
LT		 1795 /* Calculate the hash index for the GA registers */
1796
1797 hash_ix = 0;
1798 baddr = dmi->dmi_addr;
1799 hash_ix ^= (*baddr) & 0x3f;
1800 hash_ix ^= ((*baddr) >> 6) & 0x03;
1801 ++baddr;
1802 hash_ix ^= ((*baddr) << 2) & 0x03c;
1803 hash_ix ^= ((*baddr) >> 4) & 0xf;
1804 ++baddr;
1805 hash_ix ^= ((*baddr) << 4) & 0x30;
1806 hash_ix ^= ((*baddr) >> 2) & 0x3f;
1807 ++baddr;
1808 hash_ix ^= (*baddr) & 0x3f;
1809 hash_ix ^= ((*baddr) >> 6) & 0x03;
1810 ++baddr;
1811 hash_ix ^= ((*baddr) << 2) & 0x03c;
1812 hash_ix ^= ((*baddr) >> 4) & 0xf;
1813 ++baddr;
1814 hash_ix ^= ((*baddr) << 4) & 0x30;
1815 hash_ix ^= ((*baddr) >> 2) & 0x3f;
1816
1817 hash_ix &= 0x3f;
1818
1819 if (hash_ix >= 32) {
1820 hi_bits |= (1 << (hash_ix-32));
bafef0ae 1821 } else {
1da177e4
LT		 1822 lo_bits |= (1 << hash_ix);
1823 }
1824 dmi = dmi->next;
1825 }
1826 /* Disable individual receive */
1827 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1828 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1829 }
1830 *R_NETWORK_GA_0 = lo_bits;
1831 *R_NETWORK_GA_1 = hi_bits;
1832 spin_unlock(&lp->lock);
1833}
1834
1835void
bafef0ae 1836e100_hardware_send_packet(struct net_local *np, char *buf, int length)
1da177e4
LT		 1837{
1838 D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
1839
bafef0ae 1840 spin_lock(&np->led_lock);
1da177e4
LT		 1841 if (!led_active && time_after(jiffies, led_next_time)) {
1842 /* light the network leds depending on the current speed. */
1843 e100_set_network_leds(NETWORK_ACTIVITY);
1844
1845 /* Set the earliest time we may clear the LED */
1846 led_next_time = jiffies + NET_FLASH_TIME;
1847 led_active = 1;
1848 mod_timer(&clear_led_timer, jiffies + HZ/10);
1849 }
bafef0ae 1850 spin_unlock(&np->led_lock);
1da177e4
LT		 1851
1852 /* configure the tx dma descriptor */
1853 myNextTxDesc->descr.sw_len = length;
1854 myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait;
1855 myNextTxDesc->descr.buf = virt_to_phys(buf);
1856
1857 /* Move end of list */
1858 myLastTxDesc->descr.ctrl &= ~d_eol;
1859 myLastTxDesc = myNextTxDesc;
1860
1861 /* Restart DMA channel */
1862 *R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart);
1863}
1864
1865static void
1866e100_clear_network_leds(unsigned long dummy)
1867{
bafef0ae
JN		 1868 struct net_device *dev = (struct net_device *)dummy;
1869 struct net_local *np = netdev_priv(dev);
1870
1871 spin_lock(&np->led_lock);
1872
1da177e4
LT		 1873 if (led_active && time_after(jiffies, led_next_time)) {
1874 e100_set_network_leds(NO_NETWORK_ACTIVITY);
1875
1876 /* Set the earliest time we may set the LED */
1877 led_next_time = jiffies + NET_FLASH_PAUSE;
1878 led_active = 0;
1879 }
bafef0ae
JN		 1880
1881 spin_unlock(&np->led_lock);
1da177e4
LT		 1882}
1883
1884static void
1885e100_set_network_leds(int active)
1886{
1887#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK)
1888 int light_leds = (active == NO_NETWORK_ACTIVITY);
1889#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY)
1890 int light_leds = (active == NETWORK_ACTIVITY);
1891#else
1892#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY"
1893#endif
1894
1895 if (!current_speed) {
1896 /* Make LED red, link is down */
1897#if defined(CONFIG_ETRAX_NETWORK_RED_ON_NO_CONNECTION)
1898 LED_NETWORK_SET(LED_RED);
1899#else
1900 LED_NETWORK_SET(LED_OFF);
1901#endif
bafef0ae 1902 } else if (light_leds) {
1da177e4
LT		 1903 if (current_speed == 10) {
1904 LED_NETWORK_SET(LED_ORANGE);
1905 } else {
1906 LED_NETWORK_SET(LED_GREEN);
1907 }
bafef0ae 1908 } else {
1da177e4
LT		 1909 LED_NETWORK_SET(LED_OFF);
1910 }
1911}
1912
bafef0ae
JN		 1913#ifdef CONFIG_NET_POLL_CONTROLLER
1914static void
1915e100_netpoll(struct net_device* netdev)
1916{
1917 e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev, NULL);
1918}
1919#endif
1920
1da177e4
LT		 1921static int
1922etrax_init_module(void)
1923{
1924 return etrax_ethernet_init();
1925}
1926
1927static int __init
1928e100_boot_setup(char* str)
1929{
1930 struct sockaddr sa = {0};
1931 int i;
1932
1933 /* Parse the colon separated Ethernet station address */
1934 for (i = 0; i < ETH_ALEN; i++) {
1935 unsigned int tmp;
1936 if (sscanf(str + 3*i, "%2x", &tmp) != 1) {
1937 printk(KERN_WARNING "Malformed station address");
1938 return 0;
1939 }
1940 sa.sa_data[i] = (char)tmp;
1941 }
1942
1943 default_mac = sa;
1944 return 1;
1945}
1946
1947__setup("etrax100_eth=", e100_boot_setup);
1948
1949module_init(etrax_init_module);
Linux kernel - Deliverables
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