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1/*
2 * e100net.c: A network driver for the ETRAX 100LX network controller.
3 *
4 * Copyright (c) 1998-2002 Axis Communications AB.
5 *
6 * The outline of this driver comes from skeleton.c.
7 *
8 */
9
10
11#include <linux/module.h>
12
13#include <linux/kernel.h>
14#include <linux/delay.h>
15#include <linux/types.h>
16#include <linux/fcntl.h>
17#include <linux/interrupt.h>
18#include <linux/ptrace.h>
19#include <linux/ioport.h>
20#include <linux/in.h>
21#include <linux/string.h>
22#include <linux/spinlock.h>
23#include <linux/errno.h>
24#include <linux/init.h>
25#include <linux/bitops.h>
26
27#include <linux/if.h>
28#include <linux/mii.h>
29#include <linux/netdevice.h>
30#include <linux/etherdevice.h>
31#include <linux/skbuff.h>
32#include <linux/ethtool.h>
33
34#include <arch/svinto.h>/* DMA and register descriptions */
35#include <asm/io.h> /* CRIS_LED_* I/O functions */
36#include <asm/irq.h>
37#include <asm/dma.h>
38#include <asm/ethernet.h>
39#include <asm/cache.h>
40#include <arch/io_interface_mux.h>
41
42//#define ETHDEBUG
43#define D(x)
44
45/*
46 * The name of the card. Is used for messages and in the requests for
47 * io regions, irqs and dma channels
48 */
49
50static const char* cardname = "ETRAX 100LX built-in ethernet controller";
51
52/* A default ethernet address. Highlevel SW will set the real one later */
53
54static struct sockaddr default_mac = {
55 0,
56 { 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 }
57};
58
59/* Information that need to be kept for each board. */
60struct net_local {
61 struct mii_if_info mii_if;
62
63 /* Tx control lock. This protects the transmit buffer ring
64 * state along with the "tx full" state of the driver. This
65 * means all netif_queue flow control actions are protected
66 * by this lock as well.
67 */
68 spinlock_t lock;
69
70 spinlock_t led_lock; /* Protect LED state */
71 spinlock_t transceiver_lock; /* Protect transceiver state. */
72};
73
74typedef struct etrax_eth_descr
75{
76 etrax_dma_descr descr;
77 struct sk_buff* skb;
78} etrax_eth_descr;
79
80/* Some transceivers requires special handling */
81struct transceiver_ops
82{
83 unsigned int oui;
84 void (*check_speed)(struct net_device* dev);
85 void (*check_duplex)(struct net_device* dev);
86};
87
88/* Duplex settings */
89enum duplex
90{
91 half,
92 full,
93 autoneg
94};
95
96/* Dma descriptors etc. */
97
98#define MAX_MEDIA_DATA_SIZE 1522
99
100#define MIN_PACKET_LEN 46
101#define ETHER_HEAD_LEN 14
102
103/*
104** MDIO constants.
105*/
106#define MDIO_START 0x1
107#define MDIO_READ 0x2
108#define MDIO_WRITE 0x1
109#define MDIO_PREAMBLE 0xfffffffful
110
111/* Broadcom specific */
112#define MDIO_AUX_CTRL_STATUS_REG 0x18
113#define MDIO_BC_FULL_DUPLEX_IND 0x1
114#define MDIO_BC_SPEED 0x2
115
116/* TDK specific */
117#define MDIO_TDK_DIAGNOSTIC_REG 18
118#define MDIO_TDK_DIAGNOSTIC_RATE 0x400
119#define MDIO_TDK_DIAGNOSTIC_DPLX 0x800
120
121/*Intel LXT972A specific*/
122#define MDIO_INT_STATUS_REG_2 0x0011
123#define MDIO_INT_FULL_DUPLEX_IND (1 << 9)
124#define MDIO_INT_SPEED (1 << 14)
125
126/* Network flash constants */
127#define NET_FLASH_TIME (HZ/50) /* 20 ms */
128#define NET_FLASH_PAUSE (HZ/100) /* 10 ms */
129#define NET_LINK_UP_CHECK_INTERVAL (2*HZ) /* 2 s */
130#define NET_DUPLEX_CHECK_INTERVAL (2*HZ) /* 2 s */
131
132#define NO_NETWORK_ACTIVITY 0
133#define NETWORK_ACTIVITY 1
134
135#define NBR_OF_RX_DESC 32
136#define NBR_OF_TX_DESC 16
137
138/* Large packets are sent directly to upper layers while small packets are */
139/* copied (to reduce memory waste). The following constant decides the breakpoint */
140#define RX_COPYBREAK 256
141
142/* Due to a chip bug we need to flush the cache when descriptors are returned */
143/* to the DMA. To decrease performance impact we return descriptors in chunks. */
144/* The following constant determines the number of descriptors to return. */
145#define RX_QUEUE_THRESHOLD NBR_OF_RX_DESC/2
146
147#define GET_BIT(bit,val) (((val) >> (bit)) & 0x01)
148
149/* Define some macros to access ETRAX 100 registers */
150#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
151 IO_FIELD_(reg##_, field##_, val)
152#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
153 IO_STATE_(reg##_, field##_, _##val)
154
155static etrax_eth_descr *myNextRxDesc; /* Points to the next descriptor to
156 to be processed */
157static etrax_eth_descr *myLastRxDesc; /* The last processed descriptor */
158
159static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
160
161static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */
162static etrax_eth_descr* myLastTxDesc; /* End of send queue */
163static etrax_eth_descr* myNextTxDesc; /* Next descriptor to use */
164static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
165
166static unsigned int network_rec_config_shadow = 0;
167
168static unsigned int network_tr_ctrl_shadow = 0;
169
170/* Network speed indication. */
171static DEFINE_TIMER(speed_timer, NULL, 0, 0);
172static DEFINE_TIMER(clear_led_timer, NULL, 0, 0);
173static int current_speed; /* Speed read from transceiver */
174static int current_speed_selection; /* Speed selected by user */
175static unsigned long led_next_time;
176static int led_active;
177static int rx_queue_len;
178
179/* Duplex */
180static DEFINE_TIMER(duplex_timer, NULL, 0, 0);
181static int full_duplex;
182static enum duplex current_duplex;
183
184/* Index to functions, as function prototypes. */
185
186static int etrax_ethernet_init(void);
187
188static int e100_open(struct net_device *dev);
189static int e100_set_mac_address(struct net_device *dev, void *addr);
190static int e100_send_packet(struct sk_buff *skb, struct net_device *dev);
191static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id);
192static irqreturn_t e100nw_interrupt(int irq, void *dev_id);
193static void e100_rx(struct net_device *dev);
194static int e100_close(struct net_device *dev);
195static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
196static int e100_set_config(struct net_device* dev, struct ifmap* map);
197static void e100_tx_timeout(struct net_device *dev);
198static struct net_device_stats *e100_get_stats(struct net_device *dev);
199static void set_multicast_list(struct net_device *dev);
200static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
201static void update_rx_stats(struct net_device_stats *);
202static void update_tx_stats(struct net_device_stats *);
203static int e100_probe_transceiver(struct net_device* dev);
204
205static void e100_check_speed(unsigned long priv);
206static void e100_set_speed(struct net_device* dev, unsigned long speed);
207static void e100_check_duplex(unsigned long priv);
208static void e100_set_duplex(struct net_device* dev, enum duplex);
209static void e100_negotiate(struct net_device* dev);
210
211static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location);
212static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value);
213
214static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd);
215static void e100_send_mdio_bit(unsigned char bit);
216static unsigned char e100_receive_mdio_bit(void);
217static void e100_reset_transceiver(struct net_device* net);
218
219static void e100_clear_network_leds(unsigned long dummy);
220static void e100_set_network_leds(int active);
221
222static const struct ethtool_ops e100_ethtool_ops;
223#if defined(CONFIG_ETRAX_NO_PHY)
224static void dummy_check_speed(struct net_device* dev);
225static void dummy_check_duplex(struct net_device* dev);
226#else
227static void broadcom_check_speed(struct net_device* dev);
228static void broadcom_check_duplex(struct net_device* dev);
229static void tdk_check_speed(struct net_device* dev);
230static void tdk_check_duplex(struct net_device* dev);
231static void intel_check_speed(struct net_device* dev);
232static void intel_check_duplex(struct net_device* dev);
233static void generic_check_speed(struct net_device* dev);
234static void generic_check_duplex(struct net_device* dev);
235#endif
236#ifdef CONFIG_NET_POLL_CONTROLLER
237static void e100_netpoll(struct net_device* dev);
238#endif
239
240static int autoneg_normal = 1;
241
242struct transceiver_ops transceivers[] =
243{
244#if defined(CONFIG_ETRAX_NO_PHY)
245 {0x0000, dummy_check_speed, dummy_check_duplex} /* Dummy */
246#else
247 {0x1018, broadcom_check_speed, broadcom_check_duplex}, /* Broadcom */
248 {0xC039, tdk_check_speed, tdk_check_duplex}, /* TDK 2120 */
249 {0x039C, tdk_check_speed, tdk_check_duplex}, /* TDK 2120C */
250 {0x04de, intel_check_speed, intel_check_duplex}, /* Intel LXT972A*/
251 {0x0000, generic_check_speed, generic_check_duplex} /* Generic, must be last */
252#endif
253};
254
255struct transceiver_ops* transceiver = &transceivers[0];
256
257static const struct net_device_ops e100_netdev_ops = {
258 .ndo_open = e100_open,
259 .ndo_stop = e100_close,
260 .ndo_start_xmit = e100_send_packet,
261 .ndo_tx_timeout = e100_tx_timeout,
262 .ndo_get_stats = e100_get_stats,
263 .ndo_set_rx_mode = set_multicast_list,
264 .ndo_do_ioctl = e100_ioctl,
265 .ndo_set_mac_address = e100_set_mac_address,
266 .ndo_validate_addr = eth_validate_addr,
267 .ndo_change_mtu = eth_change_mtu,
268 .ndo_set_config = e100_set_config,
269#ifdef CONFIG_NET_POLL_CONTROLLER
270 .ndo_poll_controller = e100_netpoll,
271#endif
272};
273
274#define tx_done(dev) (*R_DMA_CH0_CMD == 0)
275
276/*
277 * Check for a network adaptor of this type, and return '0' if one exists.
278 * If dev->base_addr == 0, probe all likely locations.
279 * If dev->base_addr == 1, always return failure.
280 * If dev->base_addr == 2, allocate space for the device and return success
281 * (detachable devices only).
282 */
283
284static int __init
285etrax_ethernet_init(void)
286{
287 struct net_device *dev;
288 struct net_local* np;
289 int i, err;
290
291 printk(KERN_INFO
292 "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2007 Axis Communications AB\n");
293
294 if (cris_request_io_interface(if_eth, cardname)) {
295 printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
296 return -EBUSY;
297 }
298
299 dev = alloc_etherdev(sizeof(struct net_local));
300 if (!dev)
301 return -ENOMEM;
302
303 np = netdev_priv(dev);
304
305 /* we do our own locking */
306 dev->features |= NETIF_F_LLTX;
307
308 dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
309
310 /* now setup our etrax specific stuff */
311
312 dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */
313 dev->dma = NETWORK_RX_DMA_NBR;
314
315 /* fill in our handlers so the network layer can talk to us in the future */
316
317 dev->ethtool_ops = &e100_ethtool_ops;
318 dev->netdev_ops = &e100_netdev_ops;
319
320 spin_lock_init(&np->lock);
321 spin_lock_init(&np->led_lock);
322 spin_lock_init(&np->transceiver_lock);
323
324 /* Initialise the list of Etrax DMA-descriptors */
325
326 /* Initialise receive descriptors */
327
328 for (i = 0; i < NBR_OF_RX_DESC; i++) {
329 /* Allocate two extra cachelines to make sure that buffer used
330 * by DMA does not share cacheline with any other data (to
331 * avoid cache bug)
332 */
333 RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
334 if (!RxDescList[i].skb)
335 return -ENOMEM;
336 RxDescList[i].descr.ctrl = 0;
337 RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
338 RxDescList[i].descr.next = virt_to_phys(&RxDescList[i + 1]);
339 RxDescList[i].descr.buf = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
340 RxDescList[i].descr.status = 0;
341 RxDescList[i].descr.hw_len = 0;
342 prepare_rx_descriptor(&RxDescList[i].descr);
343 }
344
345 RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl = d_eol;
346 RxDescList[NBR_OF_RX_DESC - 1].descr.next = virt_to_phys(&RxDescList[0]);
347 rx_queue_len = 0;
348
349 /* Initialize transmit descriptors */
350 for (i = 0; i < NBR_OF_TX_DESC; i++) {
351 TxDescList[i].descr.ctrl = 0;
352 TxDescList[i].descr.sw_len = 0;
353 TxDescList[i].descr.next = virt_to_phys(&TxDescList[i + 1].descr);
354 TxDescList[i].descr.buf = 0;
355 TxDescList[i].descr.status = 0;
356 TxDescList[i].descr.hw_len = 0;
357 TxDescList[i].skb = 0;
358 }
359
360 TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl = d_eol;
361 TxDescList[NBR_OF_TX_DESC - 1].descr.next = virt_to_phys(&TxDescList[0].descr);
362
363 /* Initialise initial pointers */
364
365 myNextRxDesc = &RxDescList[0];
366 myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
367 myFirstTxDesc = &TxDescList[0];
368 myNextTxDesc = &TxDescList[0];
369 myLastTxDesc = &TxDescList[NBR_OF_TX_DESC - 1];
370
371 /* Register device */
372 err = register_netdev(dev);
373 if (err) {
374 free_netdev(dev);
375 return err;
376 }
377
378 /* set the default MAC address */
379
380 e100_set_mac_address(dev, &default_mac);
381
382 /* Initialize speed indicator stuff. */
383
384 current_speed = 10;
385 current_speed_selection = 0; /* Auto */
386 speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
387 speed_timer.data = (unsigned long)dev;
388 speed_timer.function = e100_check_speed;
389
390 clear_led_timer.function = e100_clear_network_leds;
391 clear_led_timer.data = (unsigned long)dev;
392
393 full_duplex = 0;
394 current_duplex = autoneg;
395 duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
396 duplex_timer.data = (unsigned long)dev;
397 duplex_timer.function = e100_check_duplex;
398
399 /* Initialize mii interface */
400 np->mii_if.phy_id_mask = 0x1f;
401 np->mii_if.reg_num_mask = 0x1f;
402 np->mii_if.dev = dev;
403 np->mii_if.mdio_read = e100_get_mdio_reg;
404 np->mii_if.mdio_write = e100_set_mdio_reg;
405
406 /* Initialize group address registers to make sure that no */
407 /* unwanted addresses are matched */
408 *R_NETWORK_GA_0 = 0x00000000;
409 *R_NETWORK_GA_1 = 0x00000000;
410
411 /* Initialize next time the led can flash */
412 led_next_time = jiffies;
413 return 0;
414}
415
416/* set MAC address of the interface. called from the core after a
417 * SIOCSIFADDR ioctl, and from the bootup above.
418 */
419
420static int
421e100_set_mac_address(struct net_device *dev, void *p)
422{
423 struct net_local *np = netdev_priv(dev);
424 struct sockaddr *addr = p;
425
426 spin_lock(&np->lock); /* preemption protection */
427
428 /* remember it */
429
430 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
431
432 /* Write it to the hardware.
433 * Note the way the address is wrapped:
434 * *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
435 * *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8);
436 */
437
438 *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
439 (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
440 *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
441 *R_NETWORK_SA_2 = 0;
442
443 /* show it in the log as well */
444
445 printk(KERN_INFO "%s: changed MAC to %pM\n", dev->name, dev->dev_addr);
446
447 spin_unlock(&np->lock);
448
449 return 0;
450}
451
452/*
453 * Open/initialize the board. This is called (in the current kernel)
454 * sometime after booting when the 'ifconfig' program is run.
455 *
456 * This routine should set everything up anew at each open, even
457 * registers that "should" only need to be set once at boot, so that
458 * there is non-reboot way to recover if something goes wrong.
459 */
460
461static int
462e100_open(struct net_device *dev)
463{
464 unsigned long flags;
465
466 /* enable the MDIO output pin */
467
468 *R_NETWORK_MGM_CTRL = IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable);
469
470 *R_IRQ_MASK0_CLR =
471 IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
472 IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
473 IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
474
475 /* clear dma0 and 1 eop and descr irq masks */
476 *R_IRQ_MASK2_CLR =
477 IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
478 IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
479 IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
480 IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
481
482 /* Reset and wait for the DMA channels */
483
484 RESET_DMA(NETWORK_TX_DMA_NBR);
485 RESET_DMA(NETWORK_RX_DMA_NBR);
486 WAIT_DMA(NETWORK_TX_DMA_NBR);
487 WAIT_DMA(NETWORK_RX_DMA_NBR);
488
489 /* Initialise the etrax network controller */
490
491 /* allocate the irq corresponding to the receiving DMA */
492
493 if (request_irq(NETWORK_DMA_RX_IRQ_NBR, e100rxtx_interrupt, 0, cardname,
494 (void *)dev)) {
495 goto grace_exit0;
496 }
497
498 /* allocate the irq corresponding to the transmitting DMA */
499
500 if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0,
501 cardname, (void *)dev)) {
502 goto grace_exit1;
503 }
504
505 /* allocate the irq corresponding to the network errors etc */
506
507 if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0,
508 cardname, (void *)dev)) {
509 goto grace_exit2;
510 }
511
512 /*
513 * Always allocate the DMA channels after the IRQ,
514 * and clean up on failure.
515 */
516
517 if (cris_request_dma(NETWORK_TX_DMA_NBR,
518 cardname,
519 DMA_VERBOSE_ON_ERROR,
520 dma_eth)) {
521 goto grace_exit3;
522 }
523
524 if (cris_request_dma(NETWORK_RX_DMA_NBR,
525 cardname,
526 DMA_VERBOSE_ON_ERROR,
527 dma_eth)) {
528 goto grace_exit4;
529 }
530
531 /* give the HW an idea of what MAC address we want */
532
533 *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
534 (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
535 *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
536 *R_NETWORK_SA_2 = 0;
537
538#if 0
539 /* use promiscuous mode for testing */
540 *R_NETWORK_GA_0 = 0xffffffff;
541 *R_NETWORK_GA_1 = 0xffffffff;
542
543 *R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */
544#else
545 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, max_size, size1522);
546 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive);
547 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable);
548 SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
549 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
550#endif
551
552 *R_NETWORK_GEN_CONFIG =
553 IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk) |
554 IO_STATE(R_NETWORK_GEN_CONFIG, enable, on);
555
556 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
557 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, delay, none);
558 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cancel, dont);
559 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cd, enable);
560 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, retry, enable);
561 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, pad, enable);
562 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable);
563 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
564
565 local_irq_save(flags);
566
567 /* enable the irq's for ethernet DMA */
568
569 *R_IRQ_MASK2_SET =
570 IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) |
571 IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set);
572
573 *R_IRQ_MASK0_SET =
574 IO_STATE(R_IRQ_MASK0_SET, overrun, set) |
575 IO_STATE(R_IRQ_MASK0_SET, underrun, set) |
576 IO_STATE(R_IRQ_MASK0_SET, excessive_col, set);
577
578 /* make sure the irqs are cleared */
579
580 *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
581 *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
582
583 /* make sure the rec and transmit error counters are cleared */
584
585 (void)*R_REC_COUNTERS; /* dummy read */
586 (void)*R_TR_COUNTERS; /* dummy read */
587
588 /* start the receiving DMA channel so we can receive packets from now on */
589
590 *R_DMA_CH1_FIRST = virt_to_phys(myNextRxDesc);
591 *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, start);
592
593 /* Set up transmit DMA channel so it can be restarted later */
594
595 *R_DMA_CH0_FIRST = 0;
596 *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
597 netif_start_queue(dev);
598
599 local_irq_restore(flags);
600
601 /* Probe for transceiver */
602 if (e100_probe_transceiver(dev))
603 goto grace_exit5;
604
605 /* Start duplex/speed timers */
606 add_timer(&speed_timer);
607 add_timer(&duplex_timer);
608
609 /* We are now ready to accept transmit requeusts from
610 * the queueing layer of the networking.
611 */
612 netif_carrier_on(dev);
613
614 return 0;
615
616grace_exit5:
617 cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
618grace_exit4:
619 cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
620grace_exit3:
621 free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
622grace_exit2:
623 free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
624grace_exit1:
625 free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
626grace_exit0:
627 return -EAGAIN;
628}
629
630#if defined(CONFIG_ETRAX_NO_PHY)
631static void
632dummy_check_speed(struct net_device* dev)
633{
634 current_speed = 100;
635}
636#else
637static void
638generic_check_speed(struct net_device* dev)
639{
640 unsigned long data;
641 struct net_local *np = netdev_priv(dev);
642
643 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
644 if ((data & ADVERTISE_100FULL) ||
645 (data & ADVERTISE_100HALF))
646 current_speed = 100;
647 else
648 current_speed = 10;
649}
650
651static void
652tdk_check_speed(struct net_device* dev)
653{
654 unsigned long data;
655 struct net_local *np = netdev_priv(dev);
656
657 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
658 MDIO_TDK_DIAGNOSTIC_REG);
659 current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10);
660}
661
662static void
663broadcom_check_speed(struct net_device* dev)
664{
665 unsigned long data;
666 struct net_local *np = netdev_priv(dev);
667
668 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
669 MDIO_AUX_CTRL_STATUS_REG);
670 current_speed = (data & MDIO_BC_SPEED ? 100 : 10);
671}
672
673static void
674intel_check_speed(struct net_device* dev)
675{
676 unsigned long data;
677 struct net_local *np = netdev_priv(dev);
678
679 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
680 MDIO_INT_STATUS_REG_2);
681 current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
682}
683#endif
684static void
685e100_check_speed(unsigned long priv)
686{
687 struct net_device* dev = (struct net_device*)priv;
688 struct net_local *np = netdev_priv(dev);
689 static int led_initiated = 0;
690 unsigned long data;
691 int old_speed = current_speed;
692
693 spin_lock(&np->transceiver_lock);
694
695 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMSR);
696 if (!(data & BMSR_LSTATUS)) {
697 current_speed = 0;
698 } else {
699 transceiver->check_speed(dev);
700 }
701
702 spin_lock(&np->led_lock);
703 if ((old_speed != current_speed) || !led_initiated) {
704 led_initiated = 1;
705 e100_set_network_leds(NO_NETWORK_ACTIVITY);
706 if (current_speed)
707 netif_carrier_on(dev);
708 else
709 netif_carrier_off(dev);
710 }
711 spin_unlock(&np->led_lock);
712
713 /* Reinitialize the timer. */
714 speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
715 add_timer(&speed_timer);
716
717 spin_unlock(&np->transceiver_lock);
718}
719
720static void
721e100_negotiate(struct net_device* dev)
722{
723 struct net_local *np = netdev_priv(dev);
724 unsigned short data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
725 MII_ADVERTISE);
726
727 /* Discard old speed and duplex settings */
728 data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL |
729 ADVERTISE_10HALF | ADVERTISE_10FULL);
730
731 switch (current_speed_selection) {
732 case 10:
733 if (current_duplex == full)
734 data |= ADVERTISE_10FULL;
735 else if (current_duplex == half)
736 data |= ADVERTISE_10HALF;
737 else
738 data |= ADVERTISE_10HALF | ADVERTISE_10FULL;
739 break;
740
741 case 100:
742 if (current_duplex == full)
743 data |= ADVERTISE_100FULL;
744 else if (current_duplex == half)
745 data |= ADVERTISE_100HALF;
746 else
747 data |= ADVERTISE_100HALF | ADVERTISE_100FULL;
748 break;
749
750 case 0: /* Auto */
751 if (current_duplex == full)
752 data |= ADVERTISE_100FULL | ADVERTISE_10FULL;
753 else if (current_duplex == half)
754 data |= ADVERTISE_100HALF | ADVERTISE_10HALF;
755 else
756 data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
757 ADVERTISE_100HALF | ADVERTISE_100FULL;
758 break;
759
760 default: /* assume autoneg speed and duplex */
761 data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
762 ADVERTISE_100HALF | ADVERTISE_100FULL;
763 break;
764 }
765
766 e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE, data);
767
768 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
769 if (autoneg_normal) {
770 /* Renegotiate with link partner */
771 data |= BMCR_ANENABLE | BMCR_ANRESTART;
772 } else {
773 /* Don't negotiate speed or duplex */
774 data &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
775
776 /* Set speed and duplex static */
777 if (current_speed_selection == 10)
778 data &= ~BMCR_SPEED100;
779 else
780 data |= BMCR_SPEED100;
781
782 if (current_duplex != full)
783 data &= ~BMCR_FULLDPLX;
784 else
785 data |= BMCR_FULLDPLX;
786 }
787 e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR, data);
788}
789
790static void
791e100_set_speed(struct net_device* dev, unsigned long speed)
792{
793 struct net_local *np = netdev_priv(dev);
794
795 spin_lock(&np->transceiver_lock);
796 if (speed != current_speed_selection) {
797 current_speed_selection = speed;
798 e100_negotiate(dev);
799 }
800 spin_unlock(&np->transceiver_lock);
801}
802
803static void
804e100_check_duplex(unsigned long priv)
805{
806 struct net_device *dev = (struct net_device *)priv;
807 struct net_local *np = netdev_priv(dev);
808 int old_duplex;
809
810 spin_lock(&np->transceiver_lock);
811 old_duplex = full_duplex;
812 transceiver->check_duplex(dev);
813 if (old_duplex != full_duplex) {
814 /* Duplex changed */
815 SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
816 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
817 }
818
819 /* Reinitialize the timer. */
820 duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
821 add_timer(&duplex_timer);
822 np->mii_if.full_duplex = full_duplex;
823 spin_unlock(&np->transceiver_lock);
824}
825#if defined(CONFIG_ETRAX_NO_PHY)
826static void
827dummy_check_duplex(struct net_device* dev)
828{
829 full_duplex = 1;
830}
831#else
832static void
833generic_check_duplex(struct net_device* dev)
834{
835 unsigned long data;
836 struct net_local *np = netdev_priv(dev);
837
838 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE);
839 if ((data & ADVERTISE_10FULL) ||
840 (data & ADVERTISE_100FULL))
841 full_duplex = 1;
842 else
843 full_duplex = 0;
844}
845
846static void
847tdk_check_duplex(struct net_device* dev)
848{
849 unsigned long data;
850 struct net_local *np = netdev_priv(dev);
851
852 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
853 MDIO_TDK_DIAGNOSTIC_REG);
854 full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
855}
856
857static void
858broadcom_check_duplex(struct net_device* dev)
859{
860 unsigned long data;
861 struct net_local *np = netdev_priv(dev);
862
863 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
864 MDIO_AUX_CTRL_STATUS_REG);
865 full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
866}
867
868static void
869intel_check_duplex(struct net_device* dev)
870{
871 unsigned long data;
872 struct net_local *np = netdev_priv(dev);
873
874 data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
875 MDIO_INT_STATUS_REG_2);
876 full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
877}
878#endif
879static void
880e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
881{
882 struct net_local *np = netdev_priv(dev);
883
884 spin_lock(&np->transceiver_lock);
885 if (new_duplex != current_duplex) {
886 current_duplex = new_duplex;
887 e100_negotiate(dev);
888 }
889 spin_unlock(&np->transceiver_lock);
890}
891
892static int
893e100_probe_transceiver(struct net_device* dev)
894{
895 int ret = 0;
896
897#if !defined(CONFIG_ETRAX_NO_PHY)
898 unsigned int phyid_high;
899 unsigned int phyid_low;
900 unsigned int oui;
901 struct transceiver_ops* ops = NULL;
902 struct net_local *np = netdev_priv(dev);
903
904 spin_lock(&np->transceiver_lock);
905
906 /* Probe MDIO physical address */
907 for (np->mii_if.phy_id = 0; np->mii_if.phy_id <= 31;
908 np->mii_if.phy_id++) {
909 if (e100_get_mdio_reg(dev,
910 np->mii_if.phy_id, MII_BMSR) != 0xffff)
911 break;
912 }
913 if (np->mii_if.phy_id == 32) {
914 ret = -ENODEV;
915 goto out;
916 }
917
918 /* Get manufacturer */
919 phyid_high = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID1);
920 phyid_low = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID2);
921 oui = (phyid_high << 6) | (phyid_low >> 10);
922
923 for (ops = &transceivers[0]; ops->oui; ops++) {
924 if (ops->oui == oui)
925 break;
926 }
927 transceiver = ops;
928out:
929 spin_unlock(&np->transceiver_lock);
930#endif
931 return ret;
932}
933
934static int
935e100_get_mdio_reg(struct net_device *dev, int phy_id, int location)
936{
937 unsigned short cmd; /* Data to be sent on MDIO port */
938 int data; /* Data read from MDIO */
939 int bitCounter;
940
941 /* Start of frame, OP Code, Physical Address, Register Address */
942 cmd = (MDIO_START << 14) | (MDIO_READ << 12) | (phy_id << 7) |
943 (location << 2);
944
945 e100_send_mdio_cmd(cmd, 0);
946
947 data = 0;
948
949 /* Data... */
950 for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
951 data |= (e100_receive_mdio_bit() << bitCounter);
952 }
953
954 return data;
955}
956
957static void
958e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value)
959{
960 int bitCounter;
961 unsigned short cmd;
962
963 cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (phy_id << 7) |
964 (location << 2);
965
966 e100_send_mdio_cmd(cmd, 1);
967
968 /* Data... */
969 for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
970 e100_send_mdio_bit(GET_BIT(bitCounter, value));
971 }
972
973}
974
975static void
976e100_send_mdio_cmd(unsigned short cmd, int write_cmd)
977{
978 int bitCounter;
979 unsigned char data = 0x2;
980
981 /* Preamble */
982 for (bitCounter = 31; bitCounter>= 0; bitCounter--)
983 e100_send_mdio_bit(GET_BIT(bitCounter, MDIO_PREAMBLE));
984
985 for (bitCounter = 15; bitCounter >= 2; bitCounter--)
986 e100_send_mdio_bit(GET_BIT(bitCounter, cmd));
987
988 /* Turnaround */
989 for (bitCounter = 1; bitCounter >= 0 ; bitCounter--)
990 if (write_cmd)
991 e100_send_mdio_bit(GET_BIT(bitCounter, data));
992 else
993 e100_receive_mdio_bit();
994}
995
996static void
997e100_send_mdio_bit(unsigned char bit)
998{
999 *R_NETWORK_MGM_CTRL =
1000 IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1001 IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1002 udelay(1);
1003 *R_NETWORK_MGM_CTRL =
1004 IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) |
1005 IO_MASK(R_NETWORK_MGM_CTRL, mdck) |
1006 IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit);
1007 udelay(1);
1008}
1009
1010static unsigned char
1011e100_receive_mdio_bit(void)
1012{
1013 unsigned char bit;
1014 *R_NETWORK_MGM_CTRL = 0;
1015 bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT);
1016 udelay(1);
1017 *R_NETWORK_MGM_CTRL = IO_MASK(R_NETWORK_MGM_CTRL, mdck);
1018 udelay(1);
1019 return bit;
1020}
1021
1022static void
1023e100_reset_transceiver(struct net_device* dev)
1024{
1025 struct net_local *np = netdev_priv(dev);
1026 unsigned short cmd;
1027 unsigned short data;
1028 int bitCounter;
1029
1030 data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
1031
1032 cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (np->mii_if.phy_id << 7) | (MII_BMCR << 2);
1033
1034 e100_send_mdio_cmd(cmd, 1);
1035
1036 data |= 0x8000;
1037
1038 for (bitCounter = 15; bitCounter >= 0 ; bitCounter--) {
1039 e100_send_mdio_bit(GET_BIT(bitCounter, data));
1040 }
1041}
1042
1043/* Called by upper layers if they decide it took too long to complete
1044 * sending a packet - we need to reset and stuff.
1045 */
1046
1047static void
1048e100_tx_timeout(struct net_device *dev)
1049{
1050 struct net_local *np = netdev_priv(dev);
1051 unsigned long flags;
1052
1053 spin_lock_irqsave(&np->lock, flags);
1054
1055 printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
1056 tx_done(dev) ? "IRQ problem" : "network cable problem");
1057
1058 /* remember we got an error */
1059
1060 dev->stats.tx_errors++;
1061
1062 /* reset the TX DMA in case it has hung on something */
1063
1064 RESET_DMA(NETWORK_TX_DMA_NBR);
1065 WAIT_DMA(NETWORK_TX_DMA_NBR);
1066
1067 /* Reset the transceiver. */
1068
1069 e100_reset_transceiver(dev);
1070
1071 /* and get rid of the packets that never got an interrupt */
1072 while (myFirstTxDesc != myNextTxDesc) {
1073 dev_kfree_skb(myFirstTxDesc->skb);
1074 myFirstTxDesc->skb = 0;
1075 myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
1076 }
1077
1078 /* Set up transmit DMA channel so it can be restarted later */
1079 *R_DMA_CH0_FIRST = 0;
1080 *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
1081
1082 /* tell the upper layers we're ok again */
1083
1084 netif_wake_queue(dev);
1085 spin_unlock_irqrestore(&np->lock, flags);
1086}
1087
1088
1089/* This will only be invoked if the driver is _not_ in XOFF state.
1090 * What this means is that we need not check it, and that this
1091 * invariant will hold if we make sure that the netif_*_queue()
1092 * calls are done at the proper times.
1093 */
1094
1095static int
1096e100_send_packet(struct sk_buff *skb, struct net_device *dev)
1097{
1098 struct net_local *np = netdev_priv(dev);
1099 unsigned char *buf = skb->data;
1100 unsigned long flags;
1101
1102#ifdef ETHDEBUG
1103 printk("send packet len %d\n", length);
1104#endif
1105 spin_lock_irqsave(&np->lock, flags); /* protect from tx_interrupt and ourself */
1106
1107 myNextTxDesc->skb = skb;
1108
1109 dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
1110
1111 e100_hardware_send_packet(np, buf, skb->len);
1112
1113 myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next);
1114
1115 /* Stop queue if full */
1116 if (myNextTxDesc == myFirstTxDesc) {
1117 netif_stop_queue(dev);
1118 }
1119
1120 spin_unlock_irqrestore(&np->lock, flags);
1121
1122 return NETDEV_TX_OK;
1123}
1124
1125/*
1126 * The typical workload of the driver:
1127 * Handle the network interface interrupts.
1128 */
1129
1130static irqreturn_t
1131e100rxtx_interrupt(int irq, void *dev_id)
1132{
1133 struct net_device *dev = (struct net_device *)dev_id;
1134 unsigned long irqbits;
1135
1136 /*
1137 * Note that both rx and tx interrupts are blocked at this point,
1138 * regardless of which got us here.
1139 */
1140
1141 irqbits = *R_IRQ_MASK2_RD;
1142
1143 /* Handle received packets */
1144 if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) {
1145 /* acknowledge the eop interrupt */
1146
1147 *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do);
1148
1149 /* check if one or more complete packets were indeed received */
1150
1151 while ((*R_DMA_CH1_FIRST != virt_to_phys(myNextRxDesc)) &&
1152 (myNextRxDesc != myLastRxDesc)) {
1153 /* Take out the buffer and give it to the OS, then
1154 * allocate a new buffer to put a packet in.
1155 */
1156 e100_rx(dev);
1157 dev->stats.rx_packets++;
1158 /* restart/continue on the channel, for safety */
1159 *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart);
1160 /* clear dma channel 1 eop/descr irq bits */
1161 *R_DMA_CH1_CLR_INTR =
1162 IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do) |
1163 IO_STATE(R_DMA_CH1_CLR_INTR, clr_descr, do);
1164
1165 /* now, we might have gotten another packet
1166 so we have to loop back and check if so */
1167 }
1168 }
1169
1170 /* Report any packets that have been sent */
1171 while (virt_to_phys(myFirstTxDesc) != *R_DMA_CH0_FIRST &&
1172 (netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
1173 dev->stats.tx_bytes += myFirstTxDesc->skb->len;
1174 dev->stats.tx_packets++;
1175
1176 /* dma is ready with the transmission of the data in tx_skb, so now
1177 we can release the skb memory */
1178 dev_kfree_skb_irq(myFirstTxDesc->skb);
1179 myFirstTxDesc->skb = 0;
1180 myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
1181 /* Wake up queue. */
1182 netif_wake_queue(dev);
1183 }
1184
1185 if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
1186 /* acknowledge the eop interrupt. */
1187 *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
1188 }
1189
1190 return IRQ_HANDLED;
1191}
1192
1193static irqreturn_t
1194e100nw_interrupt(int irq, void *dev_id)
1195{
1196 struct net_device *dev = (struct net_device *)dev_id;
1197 unsigned long irqbits = *R_IRQ_MASK0_RD;
1198
1199 /* check for underrun irq */
1200 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, underrun, active)) {
1201 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1202 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1203 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1204 dev->stats.tx_errors++;
1205 D(printk("ethernet receiver underrun!\n"));
1206 }
1207
1208 /* check for overrun irq */
1209 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, overrun, active)) {
1210 update_rx_stats(&dev->stats); /* this will ack the irq */
1211 D(printk("ethernet receiver overrun!\n"));
1212 }
1213 /* check for excessive collision irq */
1214 if (irqbits & IO_STATE(R_IRQ_MASK0_RD, excessive_col, active)) {
1215 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
1216 *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
1217 SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
1218 dev->stats.tx_errors++;
1219 D(printk("ethernet excessive collisions!\n"));
1220 }
1221 return IRQ_HANDLED;
1222}
1223
1224/* We have a good packet(s), get it/them out of the buffers. */
1225static void
1226e100_rx(struct net_device *dev)
1227{
1228 struct sk_buff *skb;
1229 int length = 0;
1230 struct net_local *np = netdev_priv(dev);
1231 unsigned char *skb_data_ptr;
1232#ifdef ETHDEBUG
1233 int i;
1234#endif
1235 etrax_eth_descr *prevRxDesc; /* The descriptor right before myNextRxDesc */
1236 spin_lock(&np->led_lock);
1237 if (!led_active && time_after(jiffies, led_next_time)) {
1238 /* light the network leds depending on the current speed. */
1239 e100_set_network_leds(NETWORK_ACTIVITY);
1240
1241 /* Set the earliest time we may clear the LED */
1242 led_next_time = jiffies + NET_FLASH_TIME;
1243 led_active = 1;
1244 mod_timer(&clear_led_timer, jiffies + HZ/10);
1245 }
1246 spin_unlock(&np->led_lock);
1247
1248 length = myNextRxDesc->descr.hw_len - 4;
1249 dev->stats.rx_bytes += length;
1250
1251#ifdef ETHDEBUG
1252 printk("Got a packet of length %d:\n", length);
1253 /* dump the first bytes in the packet */
1254 skb_data_ptr = (unsigned char *)phys_to_virt(myNextRxDesc->descr.buf);
1255 for (i = 0; i < 8; i++) {
1256 printk("%d: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", i * 8,
1257 skb_data_ptr[0],skb_data_ptr[1],skb_data_ptr[2],skb_data_ptr[3],
1258 skb_data_ptr[4],skb_data_ptr[5],skb_data_ptr[6],skb_data_ptr[7]);
1259 skb_data_ptr += 8;
1260 }
1261#endif
1262
1263 if (length < RX_COPYBREAK) {
1264 /* Small packet, copy data */
1265 skb = dev_alloc_skb(length - ETHER_HEAD_LEN);
1266 if (!skb) {
1267 dev->stats.rx_errors++;
1268 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
1269 goto update_nextrxdesc;
1270 }
1271
1272 skb_put(skb, length - ETHER_HEAD_LEN); /* allocate room for the packet body */
1273 skb_data_ptr = skb_push(skb, ETHER_HEAD_LEN); /* allocate room for the header */
1274
1275#ifdef ETHDEBUG
1276 printk("head = 0x%x, data = 0x%x, tail = 0x%x, end = 0x%x\n",
1277 skb->head, skb->data, skb_tail_pointer(skb),
1278 skb_end_pointer(skb));
1279 printk("copying packet to 0x%x.\n", skb_data_ptr);
1280#endif
1281
1282 memcpy(skb_data_ptr, phys_to_virt(myNextRxDesc->descr.buf), length);
1283 }
1284 else {
1285 /* Large packet, send directly to upper layers and allocate new
1286 * memory (aligned to cache line boundary to avoid bug).
1287 * Before sending the skb to upper layers we must make sure
1288 * that skb->data points to the aligned start of the packet.
1289 */
1290 int align;
1291 struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
1292 if (!new_skb) {
1293 dev->stats.rx_errors++;
1294 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
1295 goto update_nextrxdesc;
1296 }
1297 skb = myNextRxDesc->skb;
1298 align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data;
1299 skb_put(skb, length + align);
1300 skb_pull(skb, align); /* Remove alignment bytes */
1301 myNextRxDesc->skb = new_skb;
1302 myNextRxDesc->descr.buf = L1_CACHE_ALIGN(virt_to_phys(myNextRxDesc->skb->data));
1303 }
1304
1305 skb->protocol = eth_type_trans(skb, dev);
1306
1307 /* Send the packet to the upper layers */
1308 netif_rx(skb);
1309
1310 update_nextrxdesc:
1311 /* Prepare for next packet */
1312 myNextRxDesc->descr.status = 0;
1313 prevRxDesc = myNextRxDesc;
1314 myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next);
1315
1316 rx_queue_len++;
1317
1318 /* Check if descriptors should be returned */
1319 if (rx_queue_len == RX_QUEUE_THRESHOLD) {
1320 flush_etrax_cache();
1321 prevRxDesc->descr.ctrl |= d_eol;
1322 myLastRxDesc->descr.ctrl &= ~d_eol;
1323 myLastRxDesc = prevRxDesc;
1324 rx_queue_len = 0;
1325 }
1326}
1327
1328/* The inverse routine to net_open(). */
1329static int
1330e100_close(struct net_device *dev)
1331{
1332 printk(KERN_INFO "Closing %s.\n", dev->name);
1333
1334 netif_stop_queue(dev);
1335
1336 *R_IRQ_MASK0_CLR =
1337 IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) |
1338 IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) |
1339 IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr);
1340
1341 *R_IRQ_MASK2_CLR =
1342 IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) |
1343 IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
1344 IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) |
1345 IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
1346
1347 /* Stop the receiver and the transmitter */
1348
1349 RESET_DMA(NETWORK_TX_DMA_NBR);
1350 RESET_DMA(NETWORK_RX_DMA_NBR);
1351
1352 /* Flush the Tx and disable Rx here. */
1353
1354 free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev);
1355 free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
1356 free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
1357
1358 cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
1359 cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
1360
1361 /* Update the statistics here. */
1362
1363 update_rx_stats(&dev->stats);
1364 update_tx_stats(&dev->stats);
1365
1366 /* Stop speed/duplex timers */
1367 del_timer(&speed_timer);
1368 del_timer(&duplex_timer);
1369
1370 return 0;
1371}
1372
1373static int
1374e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1375{
1376 struct mii_ioctl_data *data = if_mii(ifr);
1377 struct net_local *np = netdev_priv(dev);
1378 int rc = 0;
1379 int old_autoneg;
1380
1381 spin_lock(&np->lock); /* Preempt protection */
1382 switch (cmd) {
1383 /* The ioctls below should be considered obsolete but are */
1384 /* still present for compatibility with old scripts/apps */
1385 case SET_ETH_SPEED_10: /* 10 Mbps */
1386 e100_set_speed(dev, 10);
1387 break;
1388 case SET_ETH_SPEED_100: /* 100 Mbps */
1389 e100_set_speed(dev, 100);
1390 break;
1391 case SET_ETH_SPEED_AUTO: /* Auto-negotiate speed */
1392 e100_set_speed(dev, 0);
1393 break;
1394 case SET_ETH_DUPLEX_HALF: /* Half duplex */
1395 e100_set_duplex(dev, half);
1396 break;
1397 case SET_ETH_DUPLEX_FULL: /* Full duplex */
1398 e100_set_duplex(dev, full);
1399 break;
1400 case SET_ETH_DUPLEX_AUTO: /* Auto-negotiate duplex */
1401 e100_set_duplex(dev, autoneg);
1402 break;
1403 case SET_ETH_AUTONEG:
1404 old_autoneg = autoneg_normal;
1405 autoneg_normal = *(int*)data;
1406 if (autoneg_normal != old_autoneg)
1407 e100_negotiate(dev);
1408 break;
1409 default:
1410 rc = generic_mii_ioctl(&np->mii_if, if_mii(ifr),
1411 cmd, NULL);
1412 break;
1413 }
1414 spin_unlock(&np->lock);
1415 return rc;
1416}
1417
1418static int e100_get_settings(struct net_device *dev,
1419 struct ethtool_cmd *cmd)
1420{
1421 struct net_local *np = netdev_priv(dev);
1422 int err;
1423
1424 spin_lock_irq(&np->lock);
1425 err = mii_ethtool_gset(&np->mii_if, cmd);
1426 spin_unlock_irq(&np->lock);
1427
1428 /* The PHY may support 1000baseT, but the Etrax100 does not. */
1429 cmd->supported &= ~(SUPPORTED_1000baseT_Half
1430 | SUPPORTED_1000baseT_Full);
1431 return err;
1432}
1433
1434static int e100_set_settings(struct net_device *dev,
1435 struct ethtool_cmd *ecmd)
1436{
1437 if (ecmd->autoneg == AUTONEG_ENABLE) {
1438 e100_set_duplex(dev, autoneg);
1439 e100_set_speed(dev, 0);
1440 } else {
1441 e100_set_duplex(dev, ecmd->duplex == DUPLEX_HALF ? half : full);
1442 e100_set_speed(dev, ecmd->speed == SPEED_10 ? 10: 100);
1443 }
1444
1445 return 0;
1446}
1447
1448static void e100_get_drvinfo(struct net_device *dev,
1449 struct ethtool_drvinfo *info)
1450{
1451 strlcpy(info->driver, "ETRAX 100LX", sizeof(info->driver));
1452 strlcpy(info->version, "$Revision: 1.31 $", sizeof(info->version));
1453 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1454 strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
1455}
1456
1457static int e100_nway_reset(struct net_device *dev)
1458{
1459 if (current_duplex == autoneg && current_speed_selection == 0)
1460 e100_negotiate(dev);
1461 return 0;
1462}
1463
1464static const struct ethtool_ops e100_ethtool_ops = {
1465 .get_settings = e100_get_settings,
1466 .set_settings = e100_set_settings,
1467 .get_drvinfo = e100_get_drvinfo,
1468 .nway_reset = e100_nway_reset,
1469 .get_link = ethtool_op_get_link,
1470};
1471
1472static int
1473e100_set_config(struct net_device *dev, struct ifmap *map)
1474{
1475 struct net_local *np = netdev_priv(dev);
1476
1477 spin_lock(&np->lock); /* Preempt protection */
1478
1479 switch(map->port) {
1480 case IF_PORT_UNKNOWN:
1481 /* Use autoneg */
1482 e100_set_speed(dev, 0);
1483 e100_set_duplex(dev, autoneg);
1484 break;
1485 case IF_PORT_10BASET:
1486 e100_set_speed(dev, 10);
1487 e100_set_duplex(dev, autoneg);
1488 break;
1489 case IF_PORT_100BASET:
1490 case IF_PORT_100BASETX:
1491 e100_set_speed(dev, 100);
1492 e100_set_duplex(dev, autoneg);
1493 break;
1494 case IF_PORT_100BASEFX:
1495 case IF_PORT_10BASE2:
1496 case IF_PORT_AUI:
1497 spin_unlock(&np->lock);
1498 return -EOPNOTSUPP;
1499 break;
1500 default:
1501 printk(KERN_ERR "%s: Invalid media selected", dev->name);
1502 spin_unlock(&np->lock);
1503 return -EINVAL;
1504 }
1505 spin_unlock(&np->lock);
1506 return 0;
1507}
1508
1509static void
1510update_rx_stats(struct net_device_stats *es)
1511{
1512 unsigned long r = *R_REC_COUNTERS;
1513 /* update stats relevant to reception errors */
1514 es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r);
1515 es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r);
1516 es->rx_frame_errors += IO_EXTRACT(R_REC_COUNTERS, alignment_error, r);
1517 es->rx_length_errors += IO_EXTRACT(R_REC_COUNTERS, oversize, r);
1518}
1519
1520static void
1521update_tx_stats(struct net_device_stats *es)
1522{
1523 unsigned long r = *R_TR_COUNTERS;
1524 /* update stats relevant to transmission errors */
1525 es->collisions +=
1526 IO_EXTRACT(R_TR_COUNTERS, single_col, r) +
1527 IO_EXTRACT(R_TR_COUNTERS, multiple_col, r);
1528}
1529
1530/*
1531 * Get the current statistics.
1532 * This may be called with the card open or closed.
1533 */
1534static struct net_device_stats *
1535e100_get_stats(struct net_device *dev)
1536{
1537 struct net_local *lp = netdev_priv(dev);
1538 unsigned long flags;
1539
1540 spin_lock_irqsave(&lp->lock, flags);
1541
1542 update_rx_stats(&dev->stats);
1543 update_tx_stats(&dev->stats);
1544
1545 spin_unlock_irqrestore(&lp->lock, flags);
1546 return &dev->stats;
1547}
1548
1549/*
1550 * Set or clear the multicast filter for this adaptor.
1551 * num_addrs == -1 Promiscuous mode, receive all packets
1552 * num_addrs == 0 Normal mode, clear multicast list
1553 * num_addrs > 0 Multicast mode, receive normal and MC packets,
1554 * and do best-effort filtering.
1555 */
1556static void
1557set_multicast_list(struct net_device *dev)
1558{
1559 struct net_local *lp = netdev_priv(dev);
1560 int num_addr = netdev_mc_count(dev);
1561 unsigned long int lo_bits;
1562 unsigned long int hi_bits;
1563
1564 spin_lock(&lp->lock);
1565 if (dev->flags & IFF_PROMISC) {
1566 /* promiscuous mode */
1567 lo_bits = 0xfffffffful;
1568 hi_bits = 0xfffffffful;
1569
1570 /* Enable individual receive */
1571 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, receive);
1572 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1573 } else if (dev->flags & IFF_ALLMULTI) {
1574 /* enable all multicasts */
1575 lo_bits = 0xfffffffful;
1576 hi_bits = 0xfffffffful;
1577
1578 /* Disable individual receive */
1579 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1580 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1581 } else if (num_addr == 0) {
1582 /* Normal, clear the mc list */
1583 lo_bits = 0x00000000ul;
1584 hi_bits = 0x00000000ul;
1585
1586 /* Disable individual receive */
1587 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1588 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1589 } else {
1590 /* MC mode, receive normal and MC packets */
1591 char hash_ix;
1592 struct netdev_hw_addr *ha;
1593 char *baddr;
1594
1595 lo_bits = 0x00000000ul;
1596 hi_bits = 0x00000000ul;
1597 netdev_for_each_mc_addr(ha, dev) {
1598 /* Calculate the hash index for the GA registers */
1599
1600 hash_ix = 0;
1601 baddr = ha->addr;
1602 hash_ix ^= (*baddr) & 0x3f;
1603 hash_ix ^= ((*baddr) >> 6) & 0x03;
1604 ++baddr;
1605 hash_ix ^= ((*baddr) << 2) & 0x03c;
1606 hash_ix ^= ((*baddr) >> 4) & 0xf;
1607 ++baddr;
1608 hash_ix ^= ((*baddr) << 4) & 0x30;
1609 hash_ix ^= ((*baddr) >> 2) & 0x3f;
1610 ++baddr;
1611 hash_ix ^= (*baddr) & 0x3f;
1612 hash_ix ^= ((*baddr) >> 6) & 0x03;
1613 ++baddr;
1614 hash_ix ^= ((*baddr) << 2) & 0x03c;
1615 hash_ix ^= ((*baddr) >> 4) & 0xf;
1616 ++baddr;
1617 hash_ix ^= ((*baddr) << 4) & 0x30;
1618 hash_ix ^= ((*baddr) >> 2) & 0x3f;
1619
1620 hash_ix &= 0x3f;
1621
1622 if (hash_ix >= 32) {
1623 hi_bits |= (1 << (hash_ix-32));
1624 } else {
1625 lo_bits |= (1 << hash_ix);
1626 }
1627 }
1628 /* Disable individual receive */
1629 SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard);
1630 *R_NETWORK_REC_CONFIG = network_rec_config_shadow;
1631 }
1632 *R_NETWORK_GA_0 = lo_bits;
1633 *R_NETWORK_GA_1 = hi_bits;
1634 spin_unlock(&lp->lock);
1635}
1636
1637void
1638e100_hardware_send_packet(struct net_local *np, char *buf, int length)
1639{
1640 D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
1641
1642 spin_lock(&np->led_lock);
1643 if (!led_active && time_after(jiffies, led_next_time)) {
1644 /* light the network leds depending on the current speed. */
1645 e100_set_network_leds(NETWORK_ACTIVITY);
1646
1647 /* Set the earliest time we may clear the LED */
1648 led_next_time = jiffies + NET_FLASH_TIME;
1649 led_active = 1;
1650 mod_timer(&clear_led_timer, jiffies + HZ/10);
1651 }
1652 spin_unlock(&np->led_lock);
1653
1654 /* configure the tx dma descriptor */
1655 myNextTxDesc->descr.sw_len = length;
1656 myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait;
1657 myNextTxDesc->descr.buf = virt_to_phys(buf);
1658
1659 /* Move end of list */
1660 myLastTxDesc->descr.ctrl &= ~d_eol;
1661 myLastTxDesc = myNextTxDesc;
1662
1663 /* Restart DMA channel */
1664 *R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart);
1665}
1666
1667static void
1668e100_clear_network_leds(unsigned long dummy)
1669{
1670 struct net_device *dev = (struct net_device *)dummy;
1671 struct net_local *np = netdev_priv(dev);
1672
1673 spin_lock(&np->led_lock);
1674
1675 if (led_active && time_after(jiffies, led_next_time)) {
1676 e100_set_network_leds(NO_NETWORK_ACTIVITY);
1677
1678 /* Set the earliest time we may set the LED */
1679 led_next_time = jiffies + NET_FLASH_PAUSE;
1680 led_active = 0;
1681 }
1682
1683 spin_unlock(&np->led_lock);
1684}
1685
1686static void
1687e100_set_network_leds(int active)
1688{
1689#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK)
1690 int light_leds = (active == NO_NETWORK_ACTIVITY);
1691#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY)
1692 int light_leds = (active == NETWORK_ACTIVITY);
1693#else
1694#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY"
1695#endif
1696
1697 if (!current_speed) {
1698 /* Make LED red, link is down */
1699 CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
1700 } else if (light_leds) {
1701 if (current_speed == 10) {
1702 CRIS_LED_NETWORK_SET(CRIS_LED_ORANGE);
1703 } else {
1704 CRIS_LED_NETWORK_SET(CRIS_LED_GREEN);
1705 }
1706 } else {
1707 CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
1708 }
1709}
1710
1711#ifdef CONFIG_NET_POLL_CONTROLLER
1712static void
1713e100_netpoll(struct net_device* netdev)
1714{
1715 e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev);
1716}
1717#endif
1718
1719static int
1720etrax_init_module(void)
1721{
1722 return etrax_ethernet_init();
1723}
1724
1725static int __init
1726e100_boot_setup(char* str)
1727{
1728 struct sockaddr sa = {0};
1729 int i;
1730
1731 /* Parse the colon separated Ethernet station address */
1732 for (i = 0; i < ETH_ALEN; i++) {
1733 unsigned int tmp;
1734 if (sscanf(str + 3*i, "%2x", &tmp) != 1) {
1735 printk(KERN_WARNING "Malformed station address");
1736 return 0;
1737 }
1738 sa.sa_data[i] = (char)tmp;
1739 }
1740
1741 default_mac = sa;
1742 return 1;
1743}
1744
1745__setup("etrax100_eth=", e100_boot_setup);
1746
1747module_init(etrax_init_module);