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mv_eth.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 22 months ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 104.0 KB

Line
1	/*
2	* (C) Copyright 2003
3	* Ingo Assmus <ingo.assmus@keymile.com>
4	*
5	* based on - Driver for MV64360X ethernet ports
6	* Copyright (C) 2002 rabeeh@galileo.co.il
7	*
8	* See file CREDITS for list of people who contributed to this
9	* project.
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU General Public License as
13	* published by the Free Software Foundation; either version 2 of
14	* the License, or (at your option) any later version.
15	*
16	* This program is distributed in the hope that it will be useful,
17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	* GNU General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, write to the Free Software
23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24	* MA 02111-1307 USA
25	*/
26
27	/*
28	* mv_eth.c - header file for the polled mode GT ethernet driver
29	*/
30	#include <common.h>
31	#include <net.h>
32	#include <malloc.h>
33
34	#include "mv_eth.h"
35
36	/* enable Debug outputs */
37
38	#undef DEBUG_MV_ETH
39
40	#ifdef DEBUG_MV_ETH
41	#define DEBUG
42	#define DP(x) x
43	#else
44	#define DP(x)
45	#endif
46
47	#undef MV64360_CHECKSUM_OFFLOAD
48	/*************************************************************************
49	**************************************************************************
50	**************************************************************************
51	* The first part is the high level driver of the gigE ethernet ports. *
52	**************************************************************************
53	**************************************************************************
54	*************************************************************************/
55
56	/* Definition for configuring driver */
57	/* #define UPDATE_STATS_BY_SOFTWARE */
58	#undef MV64360_RX_QUEUE_FILL_ON_TASK
59
60
61	/* Constants */
62	#define MAGIC_ETH_RUNNING 8031971
63	#define MV64360_INTERNAL_SRAM_SIZE _256K
64	#define EXTRA_BYTES 32
65	#define WRAP ETH_HLEN + 2 + 4 + 16
66	#define BUFFER_MTU dev->mtu + WRAP
67	#define INT_CAUSE_UNMASK_ALL 0x0007ffff
68	#define INT_CAUSE_UNMASK_ALL_EXT 0x0011ffff
69	#ifdef MV64360_RX_FILL_ON_TASK
70	#define INT_CAUSE_MASK_ALL 0x00000000
71	#define INT_CAUSE_CHECK_BITS INT_CAUSE_UNMASK_ALL
72	#define INT_CAUSE_CHECK_BITS_EXT INT_CAUSE_UNMASK_ALL_EXT
73	#endif
74
75	/* Read/Write to/from MV64360 internal registers */
76	#define MV_REG_READ(offset) my_le32_to_cpu(* (volatile unsigned int *) (INTERNAL_REG_BASE_ADDR + offset))
77	#define MV_REG_WRITE(offset,data) (volatile unsigned int ) (INTERNAL_REG_BASE_ADDR + offset) = my_cpu_to_le32 (data)
78	#define MV_SET_REG_BITS(regOffset,bits) ((((volatile unsigned int)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) \|= ((unsigned int)my_cpu_to_le32(bits)))
79	#define MV_RESET_REG_BITS(regOffset,bits) ((((volatile unsigned int)((INTERNAL_REG_BASE_ADDR) + (regOffset)))) &= ~((unsigned int)my_cpu_to_le32(bits)))
80
81	/* Static function declarations */
82	static int mv64360_eth_real_open (struct eth_device *eth);
83	static int mv64360_eth_real_stop (struct eth_device *eth);
84	static struct net_device_stats *mv64360_eth_get_stats (struct eth_device
85	*dev);
86	static void eth_port_init_mac_tables (ETH_PORT eth_port_num);
87	static void mv64360_eth_update_stat (struct eth_device *dev);
88	bool db64360_eth_start (struct eth_device *eth);
89	unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
90	unsigned int mib_offset);
91	int mv64360_eth_receive (struct eth_device *dev);
92
93	int mv64360_eth_xmit (struct eth_device , volatile void packet, int length);
94
95	#ifndef UPDATE_STATS_BY_SOFTWARE
96	static void mv64360_eth_print_stat (struct eth_device *dev);
97	#endif
98	/* Processes a received packet */
99	extern void NetReceive (volatile uchar *, int);
100
101	extern unsigned int INTERNAL_REG_BASE_ADDR;
102
103	/*************************************************
104	Helper functions - used inside the driver only
105	*************************************************/
106	#ifdef DEBUG_MV_ETH
107	void print_globals (struct eth_device *dev)
108	{
109	printf ("Ethernet PRINT_Globals-Debug function\n");
110	printf ("Base Address for ETH_PORT_INFO: %08x\n",
111	(unsigned int) dev->priv);
112	printf ("Base Address for mv64360_eth_priv: %08x\n",
113	(unsigned int) &(((ETH_PORT_INFO *) dev->priv)->
114	port_private));
115
116	printf ("GT Internal Base Address: %08x\n",
117	INTERNAL_REG_BASE_ADDR);
118	printf ("Base Address for TX-DESCs: %08x Number of allocated Buffers %d\n", (unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_tx_desc_area_base[0], MV64360_TX_QUEUE_SIZE);
119	printf ("Base Address for RX-DESCs: %08x Number of allocated Buffers %d\n", (unsigned int) ((ETH_PORT_INFO *) dev->priv)->p_rx_desc_area_base[0], MV64360_RX_QUEUE_SIZE);
120	printf ("Base Address for RX-Buffer: %08x allocated Bytes %d\n",
121	(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
122	p_rx_buffer_base[0],
123	(MV64360_RX_QUEUE_SIZE * MV64360_RX_BUFFER_SIZE) + 32);
124	printf ("Base Address for TX-Buffer: %08x allocated Bytes %d\n",
125	(unsigned int) ((ETH_PORT_INFO *) dev->priv)->
126	p_tx_buffer_base[0],
127	(MV64360_TX_QUEUE_SIZE * MV64360_TX_BUFFER_SIZE) + 32);
128	}
129	#endif
130
131	#define my_cpu_to_le32(x) my_le32_to_cpu((x))
132
133	unsigned long my_le32_to_cpu (unsigned long x)
134	{
135	return (((x & 0x000000ffU) << 24) \|
136	((x & 0x0000ff00U) << 8) \|
137	((x & 0x00ff0000U) >> 8) \| ((x & 0xff000000U) >> 24));
138	}
139
140
141	/**********************************************************************
142	* mv64360_eth_print_phy_status
143	*
144	* Prints gigabit ethenret phy status
145	*
146	* Input : pointer to ethernet interface network device structure
147	* Output : N/A
148	**********************************************************************/
149
150	static void mv64360_eth_print_phy_status (struct eth_device *dev)
151	{
152	struct mv64360_eth_priv *port_private;
153	unsigned int port_num;
154	ETH_PORT_INFO ethernet_private = (ETH_PORT_INFO ) dev->priv;
155	unsigned int port_status, phy_reg_data;
156
157	port_private =
158	(struct mv64360_eth_priv *) ethernet_private->port_private;
159	port_num = port_private->port_num;
160
161	/* Check Link status on phy */
162	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
163	if (!(phy_reg_data & 0x20)) {
164	printf ("Ethernet port changed link status to DOWN\n");
165	} else {
166	port_status =
167	MV_REG_READ (MV64360_ETH_PORT_STATUS_REG (port_num));
168	printf ("Ethernet status port %d: Link up", port_num);
169	printf (", %s",
170	(port_status & BIT2) ? "Full Duplex" : "Half Duplex");
171	if (port_status & BIT4)
172	printf (", Speed 1 Gbps");
173	else
174	printf (", %s",
175	(port_status & BIT5) ? "Speed 100 Mbps" :
176	"Speed 10 Mbps");
177	printf ("\n");
178	}
179	}
180
181	/**********************************************************************
182	* u-boot entry functions for mv64360_eth
183	*
184	**********************************************************************/
185	int db64360_eth_probe (struct eth_device *dev)
186	{
187	return ((int) db64360_eth_start (dev));
188	}
189
190	int db64360_eth_poll (struct eth_device *dev)
191	{
192	return mv64360_eth_receive (dev);
193	}
194
195	int db64360_eth_transmit (struct eth_device dev, volatile void packet,
196	int length)
197	{
198	mv64360_eth_xmit (dev, packet, length);
199	return 0;
200	}
201
202	void db64360_eth_disable (struct eth_device *dev)
203	{
204	mv64360_eth_stop (dev);
205	}
206
207
208	void mv6436x_eth_initialize (bd_t * bis)
209	{
210	struct eth_device *dev;
211	ETH_PORT_INFO *ethernet_private;
212	struct mv64360_eth_priv *port_private;
213	int devnum, x, temp;
214	char s, e, buf[64];
215
216	for (devnum = 0; devnum < MV_ETH_DEVS; devnum++) {
217	dev = calloc (sizeof (*dev), 1);
218	if (!dev) {
219	printf ("%s: mv_enet%d allocation failure, %s\n",
220	__FUNCTION__, devnum, "eth_device structure");
221	return;
222	}
223
224	/* must be less than NAMESIZE (16) */
225	sprintf (dev->name, "mv_enet%d", devnum);
226
227	#ifdef DEBUG
228	printf ("Initializing %s\n", dev->name);
229	#endif
230
231	/* Extract the MAC address from the environment */
232	switch (devnum) {
233	case 0:
234	s = "ethaddr";
235	break;
236
237	case 1:
238	s = "eth1addr";
239	break;
240
241	case 2:
242	s = "eth2addr";
243	break;
244
245	default: /* this should never happen */
246	printf ("%s: Invalid device number %d\n",
247	__FUNCTION__, devnum);
248	return;
249	}
250
251	temp = getenv_r (s, buf, sizeof (buf));
252	s = (temp > 0) ? buf : NULL;
253
254	#ifdef DEBUG
255	printf ("Setting MAC %d to %s\n", devnum, s);
256	#endif
257	for (x = 0; x < 6; ++x) {
258	dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
259	if (s)
260	s = (*e) ? e + 1 : e;
261	}
262	/* ronen - set the MAC addr in the HW */
263	eth_port_uc_addr_set (devnum, dev->enetaddr, 0);
264
265	dev->init = (void *) db64360_eth_probe;
266	dev->halt = (void *) ethernet_phy_reset;
267	dev->send = (void *) db64360_eth_transmit;
268	dev->recv = (void *) db64360_eth_poll;
269
270	ethernet_private =
271	calloc (sizeof (*ethernet_private), 1);
272	dev->priv = (void *) ethernet_private;
273	if (!ethernet_private) {
274	printf ("%s: %s allocation failure, %s\n",
275	__FUNCTION__, dev->name,
276	"Private Device Structure");
277	free (dev);
278	return;
279	}
280	/* start with an zeroed ETH_PORT_INFO */
281	memset (ethernet_private, 0, sizeof (ETH_PORT_INFO));
282	memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
283
284	/* set pointer to memory for stats data structure etc... */
285	port_private =
286	calloc (sizeof (*ethernet_private), 1);
287	ethernet_private->port_private = (void *)port_private;
288	if (!port_private) {
289	printf ("%s: %s allocation failure, %s\n",
290	__FUNCTION__, dev->name,
291	"Port Private Device Structure");
292
293	free (ethernet_private);
294	free (dev);
295	return;
296	}
297
298	port_private->stats =
299	calloc (sizeof (struct net_device_stats), 1);
300	if (!port_private->stats) {
301	printf ("%s: %s allocation failure, %s\n",
302	__FUNCTION__, dev->name,
303	"Net stat Structure");
304
305	free (port_private);
306	free (ethernet_private);
307	free (dev);
308	return;
309	}
310	memset (ethernet_private->port_private, 0,
311	sizeof (struct mv64360_eth_priv));
312	switch (devnum) {
313	case 0:
314	ethernet_private->port_num = ETH_0;
315	break;
316	case 1:
317	ethernet_private->port_num = ETH_1;
318	break;
319	case 2:
320	ethernet_private->port_num = ETH_2;
321	break;
322	default:
323	printf ("Invalid device number %d\n", devnum);
324	break;
325	};
326
327	port_private->port_num = devnum;
328	/*
329	* Read MIB counter on the GT in order to reset them,
330	* then zero all the stats fields in memory
331	*/
332	mv64360_eth_update_stat (dev);
333	memset (port_private->stats, 0,
334	sizeof (struct net_device_stats));
335	/* Extract the MAC address from the environment */
336	switch (devnum) {
337	case 0:
338	s = "ethaddr";
339	break;
340
341	case 1:
342	s = "eth1addr";
343	break;
344
345	case 2:
346	s = "eth2addr";
347	break;
348
349	default: /* this should never happen */
350	printf ("%s: Invalid device number %d\n",
351	__FUNCTION__, devnum);
352	return;
353	}
354
355	temp = getenv_r (s, buf, sizeof (buf));
356	s = (temp > 0) ? buf : NULL;
357
358	#ifdef DEBUG
359	printf ("Setting MAC %d to %s\n", devnum, s);
360	#endif
361	for (x = 0; x < 6; ++x) {
362	dev->enetaddr[x] = s ? simple_strtoul (s, &e, 16) : 0;
363	if (s)
364	s = (*e) ? e + 1 : e;
365	}
366
367	DP (printf ("Allocating descriptor and buffer rings\n"));
368
369	ethernet_private->p_rx_desc_area_base[0] =
370	(ETH_RX_DESC *) memalign (16,
371	RX_DESC_ALIGNED_SIZE *
372	MV64360_RX_QUEUE_SIZE + 1);
373	ethernet_private->p_tx_desc_area_base[0] =
374	(ETH_TX_DESC *) memalign (16,
375	TX_DESC_ALIGNED_SIZE *
376	MV64360_TX_QUEUE_SIZE + 1);
377
378	ethernet_private->p_rx_buffer_base[0] =
379	(char *) memalign (16,
380	MV64360_RX_QUEUE_SIZE *
381	MV64360_TX_BUFFER_SIZE + 1);
382	ethernet_private->p_tx_buffer_base[0] =
383	(char *) memalign (16,
384	MV64360_RX_QUEUE_SIZE *
385	MV64360_TX_BUFFER_SIZE + 1);
386
387	#ifdef DEBUG_MV_ETH
388	/* DEBUG OUTPUT prints adresses of globals */
389	print_globals (dev);
390	#endif
391	eth_register (dev);
392
393	}
394	DP (printf ("%s: exit\n", __FUNCTION__));
395
396	}
397
398	/**********************************************************************
399	* mv64360_eth_open
400	*
401	* This function is called when openning the network device. The function
402	* should initialize all the hardware, initialize cyclic Rx/Tx
403	* descriptors chain and buffers and allocate an IRQ to the network
404	* device.
405	*
406	* Input : a pointer to the network device structure
407	* / / ronen - changed the output to match net/eth.c needs
408	* Output : nonzero of success , zero if fails.
409	* under construction
410	**********************************************************************/
411
412	int mv64360_eth_open (struct eth_device *dev)
413	{
414	return (mv64360_eth_real_open (dev));
415	}
416
417	/* Helper function for mv64360_eth_open */
418	static int mv64360_eth_real_open (struct eth_device *dev)
419	{
420
421	unsigned int queue;
422	ETH_PORT_INFO *ethernet_private;
423	struct mv64360_eth_priv *port_private;
424	unsigned int port_num;
425	u32 port_status, phy_reg_data;
426
427	ethernet_private = (ETH_PORT_INFO *) dev->priv;
428	/* ronen - when we update the MAC env params we only update dev->enetaddr
429	see ./net/eth.c eth_set_enetaddr() */
430	memcpy (ethernet_private->port_mac_addr, dev->enetaddr, 6);
431
432	port_private =
433	(struct mv64360_eth_priv *) ethernet_private->port_private;
434	port_num = port_private->port_num;
435
436	/* Stop RX Queues */
437	MV_REG_WRITE (MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num),
438	0x0000ff00);
439
440	/* Clear the ethernet port interrupts */
441	MV_REG_WRITE (MV64360_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
442	MV_REG_WRITE (MV64360_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
443
444	/* Unmask RX buffer and TX end interrupt */
445	MV_REG_WRITE (MV64360_ETH_INTERRUPT_MASK_REG (port_num),
446	INT_CAUSE_UNMASK_ALL);
447
448	/* Unmask phy and link status changes interrupts */
449	MV_REG_WRITE (MV64360_ETH_INTERRUPT_EXTEND_MASK_REG (port_num),
450	INT_CAUSE_UNMASK_ALL_EXT);
451
452	/* Set phy address of the port */
453	ethernet_private->port_phy_addr = 0x8 + port_num;
454
455	/* Activate the DMA channels etc */
456	eth_port_init (ethernet_private);
457
458
459	/* "Allocate" setup TX rings */
460
461	for (queue = 0; queue < MV64360_TX_QUEUE_NUM; queue++) {
462	unsigned int size;
463
464	port_private->tx_ring_size[queue] = MV64360_TX_QUEUE_SIZE;
465	size = (port_private->tx_ring_size[queue] * TX_DESC_ALIGNED_SIZE); /size = no of DESCs times DESC-size /
466	ethernet_private->tx_desc_area_size[queue] = size;
467
468	/* first clear desc area completely */
469	memset ((void *) ethernet_private->p_tx_desc_area_base[queue],
470	0, ethernet_private->tx_desc_area_size[queue]);
471
472	/* initialize tx desc ring with low level driver */
473	if (ether_init_tx_desc_ring
474	(ethernet_private, ETH_Q0,
475	port_private->tx_ring_size[queue],
476	MV64360_TX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
477	(unsigned int) ethernet_private->
478	p_tx_desc_area_base[queue],
479	(unsigned int) ethernet_private->
480	p_tx_buffer_base[queue]) == false)
481	printf ("### Error initializing TX Ring\n");
482	}
483
484	/* "Allocate" setup RX rings */
485	for (queue = 0; queue < MV64360_RX_QUEUE_NUM; queue++) {
486	unsigned int size;
487
488	/* Meantime RX Ring are fixed - but must be configurable by user */
489	port_private->rx_ring_size[queue] = MV64360_RX_QUEUE_SIZE;
490	size = (port_private->rx_ring_size[queue] *
491	RX_DESC_ALIGNED_SIZE);
492	ethernet_private->rx_desc_area_size[queue] = size;
493
494	/* first clear desc area completely */
495	memset ((void *) ethernet_private->p_rx_desc_area_base[queue],
496	0, ethernet_private->rx_desc_area_size[queue]);
497	if ((ether_init_rx_desc_ring
498	(ethernet_private, ETH_Q0,
499	port_private->rx_ring_size[queue],
500	MV64360_RX_BUFFER_SIZE /* Each Buffer is 1600 Byte */ ,
501	(unsigned int) ethernet_private->
502	p_rx_desc_area_base[queue],
503	(unsigned int) ethernet_private->
504	p_rx_buffer_base[queue])) == false)
505	printf ("### Error initializing RX Ring\n");
506	}
507
508	eth_port_start (ethernet_private);
509
510	/* Set maximum receive buffer to 9700 bytes */
511	MV_REG_WRITE (MV64360_ETH_PORT_SERIAL_CONTROL_REG (port_num),
512	(0x5 << 17) \|
513	(MV_REG_READ
514	(MV64360_ETH_PORT_SERIAL_CONTROL_REG (port_num))
515	& 0xfff1ffff));
516
517	/*
518	* Set ethernet MTU for leaky bucket mechanism to 0 - this will
519	* disable the leaky bucket mechanism .
520	*/
521
522	MV_REG_WRITE (MV64360_ETH_MAXIMUM_TRANSMIT_UNIT (port_num), 0);
523	port_status = MV_REG_READ (MV64360_ETH_PORT_STATUS_REG (port_num));
524
525	/* Check Link status on phy */
526	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
527	if (!(phy_reg_data & 0x20)) {
528	/* Reset PHY */
529	if ((ethernet_phy_reset (port_num)) != true) {
530	printf ("$$ Warnning: No link on port %d \n",
531	port_num);
532	return 0;
533	} else {
534	eth_port_read_smi_reg (port_num, 1, &phy_reg_data);
535	if (!(phy_reg_data & 0x20)) {
536	printf ("### Error: Phy is not active\n");
537	return 0;
538	}
539	}
540	} else {
541	mv64360_eth_print_phy_status (dev);
542	}
543	port_private->eth_running = MAGIC_ETH_RUNNING;
544	return 1;
545	}
546
547
548	static int mv64360_eth_free_tx_rings (struct eth_device *dev)
549	{
550	unsigned int queue;
551	ETH_PORT_INFO *ethernet_private;
552	struct mv64360_eth_priv *port_private;
553	unsigned int port_num;
554	volatile ETH_TX_DESC *p_tx_curr_desc;
555
556	ethernet_private = (ETH_PORT_INFO *) dev->priv;
557	port_private =
558	(struct mv64360_eth_priv *) ethernet_private->port_private;
559	port_num = port_private->port_num;
560
561	/* Stop Tx Queues */
562	MV_REG_WRITE (MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG (port_num),
563	0x0000ff00);
564
565	/* Free TX rings */
566	DP (printf ("Clearing previously allocated TX queues... "));
567	for (queue = 0; queue < MV64360_TX_QUEUE_NUM; queue++) {
568	/* Free on TX rings */
569	for (p_tx_curr_desc =
570	ethernet_private->p_tx_desc_area_base[queue];
571	((unsigned int) p_tx_curr_desc <= (unsigned int)
572	ethernet_private->p_tx_desc_area_base[queue] +
573	ethernet_private->tx_desc_area_size[queue]);
574	p_tx_curr_desc =
575	(ETH_TX_DESC *) ((unsigned int) p_tx_curr_desc +
576	TX_DESC_ALIGNED_SIZE)) {
577	/* this is inside for loop */
578	if (p_tx_curr_desc->return_info != 0) {
579	p_tx_curr_desc->return_info = 0;
580	DP (printf ("freed\n"));
581	}
582	}
583	DP (printf ("Done\n"));
584	}
585	return 0;
586	}
587
588	static int mv64360_eth_free_rx_rings (struct eth_device *dev)
589	{
590	unsigned int queue;
591	ETH_PORT_INFO *ethernet_private;
592	struct mv64360_eth_priv *port_private;
593	unsigned int port_num;
594	volatile ETH_RX_DESC *p_rx_curr_desc;
595
596	ethernet_private = (ETH_PORT_INFO *) dev->priv;
597	port_private =
598	(struct mv64360_eth_priv *) ethernet_private->port_private;
599	port_num = port_private->port_num;
600
601
602	/* Stop RX Queues */
603	MV_REG_WRITE (MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG (port_num),
604	0x0000ff00);
605
606	/* Free RX rings */
607	DP (printf ("Clearing previously allocated RX queues... "));
608	for (queue = 0; queue < MV64360_RX_QUEUE_NUM; queue++) {
609	/* Free preallocated skb's on RX rings */
610	for (p_rx_curr_desc =
611	ethernet_private->p_rx_desc_area_base[queue];
612	(((unsigned int) p_rx_curr_desc <
613	((unsigned int) ethernet_private->
614	p_rx_desc_area_base[queue] +
615	ethernet_private->rx_desc_area_size[queue])));
616	p_rx_curr_desc =
617	(ETH_RX_DESC *) ((unsigned int) p_rx_curr_desc +
618	RX_DESC_ALIGNED_SIZE)) {
619	if (p_rx_curr_desc->return_info != 0) {
620	p_rx_curr_desc->return_info = 0;
621	DP (printf ("freed\n"));
622	}
623	}
624	DP (printf ("Done\n"));
625	}
626	return 0;
627	}
628
629	/**********************************************************************
630	* mv64360_eth_stop
631	*
632	* This function is used when closing the network device.
633	* It updates the hardware,
634	* release all memory that holds buffers and descriptors and release the IRQ.
635	* Input : a pointer to the device structure
636	* Output : zero if success , nonzero if fails
637	*********************************************************************/
638
639	int mv64360_eth_stop (struct eth_device *dev)
640	{
641	ETH_PORT_INFO *ethernet_private;
642	struct mv64360_eth_priv *port_private;
643	unsigned int port_num;
644
645	ethernet_private = (ETH_PORT_INFO *) dev->priv;
646	port_private =
647	(struct mv64360_eth_priv *) ethernet_private->port_private;
648	port_num = port_private->port_num;
649
650	/* Disable all gigE address decoder */
651	MV_REG_WRITE (MV64360_ETH_BASE_ADDR_ENABLE_REG, 0x3f);
652	DP (printf ("%s Ethernet stop called ... \n", __FUNCTION__));
653	mv64360_eth_real_stop (dev);
654
655	return 0;
656	};
657
658	/* Helper function for mv64360_eth_stop */
659
660	static int mv64360_eth_real_stop (struct eth_device *dev)
661	{
662	ETH_PORT_INFO *ethernet_private;
663	struct mv64360_eth_priv *port_private;
664	unsigned int port_num;
665
666	ethernet_private = (ETH_PORT_INFO *) dev->priv;
667	port_private =
668	(struct mv64360_eth_priv *) ethernet_private->port_private;
669	port_num = port_private->port_num;
670
671
672	mv64360_eth_free_tx_rings (dev);
673	mv64360_eth_free_rx_rings (dev);
674
675	eth_port_reset (ethernet_private->port_num);
676	/* Disable ethernet port interrupts */
677	MV_REG_WRITE (MV64360_ETH_INTERRUPT_CAUSE_REG (port_num), 0);
678	MV_REG_WRITE (MV64360_ETH_INTERRUPT_CAUSE_EXTEND_REG (port_num), 0);
679	/* Mask RX buffer and TX end interrupt */
680	MV_REG_WRITE (MV64360_ETH_INTERRUPT_MASK_REG (port_num), 0);
681	/* Mask phy and link status changes interrupts */
682	MV_REG_WRITE (MV64360_ETH_INTERRUPT_EXTEND_MASK_REG (port_num), 0);
683	MV_RESET_REG_BITS (MV64360_CPU_INTERRUPT0_MASK_HIGH,
684	BIT0 << port_num);
685	/* Print Network statistics */
686	#ifndef UPDATE_STATS_BY_SOFTWARE
687	/*
688	* Print statistics (only if ethernet is running),
689	* then zero all the stats fields in memory
690	*/
691	if (port_private->eth_running == MAGIC_ETH_RUNNING) {
692	port_private->eth_running = 0;
693	mv64360_eth_print_stat (dev);
694	}
695	memset (port_private->stats, 0, sizeof (struct net_device_stats));
696	#endif
697	DP (printf ("\nEthernet stopped ... \n"));
698	return 0;
699	}
700
701
702	/**********************************************************************
703	* mv64360_eth_start_xmit
704	*
705	* This function is queues a packet in the Tx descriptor for
706	* required port.
707	*
708	* Input : skb - a pointer to socket buffer
709	* dev - a pointer to the required port
710	*
711	* Output : zero upon success
712	**********************************************************************/
713
714	int mv64360_eth_xmit (struct eth_device dev, volatile void dataPtr,
715	int dataSize)
716	{
717	ETH_PORT_INFO *ethernet_private;
718	struct mv64360_eth_priv *port_private;
719	unsigned int port_num;
720	PKT_INFO pkt_info;
721	ETH_FUNC_RET_STATUS status;
722	struct net_device_stats *stats;
723	ETH_FUNC_RET_STATUS release_result;
724
725	ethernet_private = (ETH_PORT_INFO *) dev->priv;
726	port_private =
727	(struct mv64360_eth_priv *) ethernet_private->port_private;
728	port_num = port_private->port_num;
729
730	stats = port_private->stats;
731
732	/* Update packet info data structure */
733	pkt_info.cmd_sts = ETH_TX_FIRST_DESC \| ETH_TX_LAST_DESC; /* DMA owned, first last */
734	pkt_info.byte_cnt = dataSize;
735	pkt_info.buf_ptr = (unsigned int) dataPtr;
736	pkt_info.return_info = 0;
737
738	status = eth_port_send (ethernet_private, ETH_Q0, &pkt_info);
739	if ((status == ETH_ERROR) \|\| (status == ETH_QUEUE_FULL)) {
740	printf ("Error on transmitting packet ..");
741	if (status == ETH_QUEUE_FULL)
742	printf ("ETH Queue is full. \n");
743	if (status == ETH_QUEUE_LAST_RESOURCE)
744	printf ("ETH Queue: using last available resource. \n");
745	goto error;
746	}
747
748	/* Update statistics and start of transmittion time */
749	stats->tx_bytes += dataSize;
750	stats->tx_packets++;
751
752	/* Check if packet(s) is(are) transmitted correctly (release everything) */
753	do {
754	release_result =
755	eth_tx_return_desc (ethernet_private, ETH_Q0,
756	&pkt_info);
757	switch (release_result) {
758	case ETH_OK:
759	DP (printf ("descriptor released\n"));
760	if (pkt_info.cmd_sts & BIT0) {
761	printf ("Error in TX\n");
762	stats->tx_errors++;
763
764	}
765	break;
766	case ETH_RETRY:
767	DP (printf ("transmission still in process\n"));
768	break;
769
770	case ETH_ERROR:
771	printf ("routine can not access Tx desc ring\n");
772	break;
773
774	case ETH_END_OF_JOB:
775	DP (printf ("the routine has nothing to release\n"));
776	break;
777	default: /* should not happen */
778	break;
779	}
780	} while (release_result == ETH_OK);
781
782
783	return 0; /* success */
784	error:
785	return 1; /* Failed - higher layers will free the skb */
786	}
787
788	/**********************************************************************
789	* mv64360_eth_receive
790	*
791	* This function is forward packets that are received from the port's
792	* queues toward kernel core or FastRoute them to another interface.
793	*
794	* Input : dev - a pointer to the required interface
795	* max - maximum number to receive (0 means unlimted)
796	*
797	* Output : number of served packets
798	**********************************************************************/
799
800	int mv64360_eth_receive (struct eth_device *dev)
801	{
802	ETH_PORT_INFO *ethernet_private;
803	struct mv64360_eth_priv *port_private;
804	unsigned int port_num;
805	PKT_INFO pkt_info;
806	struct net_device_stats *stats;
807
808
809	ethernet_private = (ETH_PORT_INFO *) dev->priv;
810	port_private =
811	(struct mv64360_eth_priv *) ethernet_private->port_private;
812	port_num = port_private->port_num;
813	stats = port_private->stats;
814
815	while ((eth_port_receive (ethernet_private, ETH_Q0, &pkt_info) ==
816	ETH_OK)) {
817
818	#ifdef DEBUG_MV_ETH
819	if (pkt_info.byte_cnt != 0) {
820	printf ("%s: Received %d byte Packet @ 0x%x\n",
821	__FUNCTION__, pkt_info.byte_cnt,
822	pkt_info.buf_ptr);
823	}
824	#endif
825	/* Update statistics. Note byte count includes 4 byte CRC count */
826	stats->rx_packets++;
827	stats->rx_bytes += pkt_info.byte_cnt;
828
829	/*
830	* In case received a packet without first / last bits on OR the error
831	* summary bit is on, the packets needs to be dropeed.
832	*/
833	if (((pkt_info.
834	cmd_sts & (ETH_RX_FIRST_DESC \| ETH_RX_LAST_DESC)) !=
835	(ETH_RX_FIRST_DESC \| ETH_RX_LAST_DESC))
836	\|\| (pkt_info.cmd_sts & ETH_ERROR_SUMMARY)) {
837	stats->rx_dropped++;
838
839	printf ("Received packet spread on multiple descriptors\n");
840
841	/* Is this caused by an error ? */
842	if (pkt_info.cmd_sts & ETH_ERROR_SUMMARY) {
843	stats->rx_errors++;
844	}
845
846	/* free these descriptors again without forwarding them to the higher layers */
847	pkt_info.buf_ptr &= ~0x7; /* realign buffer again */
848	pkt_info.byte_cnt = 0x0000; /* Reset Byte count */
849
850	if (eth_rx_return_buff
851	(ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
852	printf ("Error while returning the RX Desc to Ring\n");
853	} else {
854	DP (printf ("RX Desc returned to Ring\n"));
855	}
856	/* /free these descriptors again */
857	} else {
858
859	/* !!! call higher layer processing */
860	#ifdef DEBUG_MV_ETH
861	printf ("\nNow send it to upper layer protocols (NetReceive) ...\n");
862	#endif
863	/* let the upper layer handle the packet */
864	NetReceive ((uchar *) pkt_info.buf_ptr,
865	(int) pkt_info.byte_cnt);
866
867	/* **************************************************************** */
868	/* free descriptor */
869	pkt_info.buf_ptr &= ~0x7; /* realign buffer again */
870	pkt_info.byte_cnt = 0x0000; /* Reset Byte count */
871	DP (printf
872	("RX: pkt_info.buf_ptr = %x\n",
873	pkt_info.buf_ptr));
874	if (eth_rx_return_buff
875	(ethernet_private, ETH_Q0, &pkt_info) != ETH_OK) {
876	printf ("Error while returning the RX Desc to Ring\n");
877	} else {
878	DP (printf ("RX Desc returned to Ring\n"));
879	}
880
881	/* **************************************************************** */
882
883	}
884	}
885	mv64360_eth_get_stats (dev); /* update statistics */
886	return 1;
887	}
888
889	/**********************************************************************
890	* mv64360_eth_get_stats
891	*
892	* Returns a pointer to the interface statistics.
893	*
894	* Input : dev - a pointer to the required interface
895	*
896	* Output : a pointer to the interface's statistics
897	**********************************************************************/
898
899	static struct net_device_stats mv64360_eth_get_stats (struct eth_device dev)
900	{
901	ETH_PORT_INFO *ethernet_private;
902	struct mv64360_eth_priv *port_private;
903	unsigned int port_num;
904
905	ethernet_private = (ETH_PORT_INFO *) dev->priv;
906	port_private =
907	(struct mv64360_eth_priv *) ethernet_private->port_private;
908	port_num = port_private->port_num;
909
910	mv64360_eth_update_stat (dev);
911
912	return port_private->stats;
913	}
914
915
916	/**********************************************************************
917	* mv64360_eth_update_stat
918	*
919	* Update the statistics structure in the private data structure
920	*
921	* Input : pointer to ethernet interface network device structure
922	* Output : N/A
923	**********************************************************************/
924
925	static void mv64360_eth_update_stat (struct eth_device *dev)
926	{
927	ETH_PORT_INFO *ethernet_private;
928	struct mv64360_eth_priv *port_private;
929	struct net_device_stats *stats;
930	unsigned int port_num;
931	volatile unsigned int dummy;
932
933	ethernet_private = (ETH_PORT_INFO *) dev->priv;
934	port_private =
935	(struct mv64360_eth_priv *) ethernet_private->port_private;
936	port_num = port_private->port_num;
937	stats = port_private->stats;
938
939	/* These are false updates */
940	stats->rx_packets += (unsigned long)
941	eth_read_mib_counter (ethernet_private->port_num,
942	ETH_MIB_GOOD_FRAMES_RECEIVED);
943	stats->tx_packets += (unsigned long)
944	eth_read_mib_counter (ethernet_private->port_num,
945	ETH_MIB_GOOD_FRAMES_SENT);
946	stats->rx_bytes += (unsigned long)
947	eth_read_mib_counter (ethernet_private->port_num,
948	ETH_MIB_GOOD_OCTETS_RECEIVED_LOW);
949	/*
950	* Ideally this should be as follows -
951	*
952	* stats->rx_bytes += stats->rx_bytes +
953	* ((unsigned long) ethReadMibCounter (ethernet_private->port_num ,
954	* ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH) << 32);
955	*
956	* But the unsigned long in PowerPC and MIPS are 32bit. So the next read
957	* is just a dummy read for proper work of the GigE port
958	*/
959	dummy = eth_read_mib_counter (ethernet_private->port_num,
960	ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH);
961	stats->tx_bytes += (unsigned long)
962	eth_read_mib_counter (ethernet_private->port_num,
963	ETH_MIB_GOOD_OCTETS_SENT_LOW);
964	dummy = eth_read_mib_counter (ethernet_private->port_num,
965	ETH_MIB_GOOD_OCTETS_SENT_HIGH);
966	stats->rx_errors += (unsigned long)
967	eth_read_mib_counter (ethernet_private->port_num,
968	ETH_MIB_MAC_RECEIVE_ERROR);
969
970	/* Rx dropped is for received packet with CRC error */
971	stats->rx_dropped +=
972	(unsigned long) eth_read_mib_counter (ethernet_private->
973	port_num,
974	ETH_MIB_BAD_CRC_EVENT);
975	stats->multicast += (unsigned long)
976	eth_read_mib_counter (ethernet_private->port_num,
977	ETH_MIB_MULTICAST_FRAMES_RECEIVED);
978	stats->collisions +=
979	(unsigned long) eth_read_mib_counter (ethernet_private->
980	port_num,
981	ETH_MIB_COLLISION) +
982	(unsigned long) eth_read_mib_counter (ethernet_private->
983	port_num,
984	ETH_MIB_LATE_COLLISION);
985	/* detailed rx errors */
986	stats->rx_length_errors +=
987	(unsigned long) eth_read_mib_counter (ethernet_private->
988	port_num,
989	ETH_MIB_UNDERSIZE_RECEIVED)
990	+
991	(unsigned long) eth_read_mib_counter (ethernet_private->
992	port_num,
993	ETH_MIB_OVERSIZE_RECEIVED);
994	/* detailed tx errors */
995	}
996
997	#ifndef UPDATE_STATS_BY_SOFTWARE
998	/**********************************************************************
999	* mv64360_eth_print_stat
1000	*
1001	* Update the statistics structure in the private data structure
1002	*
1003	* Input : pointer to ethernet interface network device structure
1004	* Output : N/A
1005	**********************************************************************/
1006
1007	static void mv64360_eth_print_stat (struct eth_device *dev)
1008	{
1009	ETH_PORT_INFO *ethernet_private;
1010	struct mv64360_eth_priv *port_private;
1011	struct net_device_stats *stats;
1012	unsigned int port_num;
1013
1014	ethernet_private = (ETH_PORT_INFO *) dev->priv;
1015	port_private =
1016	(struct mv64360_eth_priv *) ethernet_private->port_private;
1017	port_num = port_private->port_num;
1018	stats = port_private->stats;
1019
1020	/* These are false updates */
1021	printf ("\n### Network statistics: ###\n");
1022	printf ("--------------------------\n");
1023	printf (" Packets received: %ld\n", stats->rx_packets);
1024	printf (" Packets send: %ld\n", stats->tx_packets);
1025	printf (" Received bytes: %ld\n", stats->rx_bytes);
1026	printf (" Send bytes: %ld\n", stats->tx_bytes);
1027	if (stats->rx_errors != 0)
1028	printf (" Rx Errors: %ld\n",
1029	stats->rx_errors);
1030	if (stats->rx_dropped != 0)
1031	printf (" Rx dropped (CRC Errors): %ld\n",
1032	stats->rx_dropped);
1033	if (stats->multicast != 0)
1034	printf (" Rx mulicast frames: %ld\n",
1035	stats->multicast);
1036	if (stats->collisions != 0)
1037	printf (" No. of collisions: %ld\n",
1038	stats->collisions);
1039	if (stats->rx_length_errors != 0)
1040	printf (" Rx length errors: %ld\n",
1041	stats->rx_length_errors);
1042	}
1043	#endif
1044
1045	/**************************************************************************
1046	*network_start - Network Kick Off Routine UBoot
1047	*Inputs :
1048	*Outputs :
1049	**************************************************************************/
1050
1051	bool db64360_eth_start (struct eth_device *dev)
1052	{
1053	return (mv64360_eth_open (dev)); /* calls real open */
1054	}
1055
1056	/*************************************************************************
1057	**************************************************************************
1058	**************************************************************************
1059	* The second part is the low level driver of the gigE ethernet ports. *
1060	**************************************************************************
1061	**************************************************************************
1062	*************************************************************************/
1063	/*
1064	* based on Linux code
1065	* arch/ppc/galileo/EVB64360/mv64360_eth.c - Driver for MV64360X ethernet ports
1066	* Copyright (C) 2002 rabeeh@galileo.co.il
1067
1068	* This program is free software; you can redistribute it and/or
1069	* modify it under the terms of the GNU General Public License
1070	* as published by the Free Software Foundation; either version 2
1071	* of the License, or (at your option) any later version.
1072
1073	* This program is distributed in the hope that it will be useful,
1074	* but WITHOUT ANY WARRANTY; without even the implied warranty of
1075	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1076	* GNU General Public License for more details.
1077
1078	* You should have received a copy of the GNU General Public License
1079	* along with this program; if not, write to the Free Software
1080	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
1081	*
1082	*/
1083
1084	/********************************************************************************
1085	* Marvell's Gigabit Ethernet controller low level driver
1086	*
1087	* DESCRIPTION:
1088	* This file introduce low level API to Marvell's Gigabit Ethernet
1089	* controller. This Gigabit Ethernet Controller driver API controls
1090	* 1) Operations (i.e. port init, start, reset etc').
1091	* 2) Data flow (i.e. port send, receive etc').
1092	* Each Gigabit Ethernet port is controlled via ETH_PORT_INFO
1093	* struct.
1094	* This struct includes user configuration information as well as
1095	* driver internal data needed for its operations.
1096	*
1097	* Supported Features:
1098	* - This low level driver is OS independent. Allocating memory for
1099	* the descriptor rings and buffers are not within the scope of
1100	* this driver.
1101	* - The user is free from Rx/Tx queue managing.
1102	* - This low level driver introduce functionality API that enable
1103	* the to operate Marvell's Gigabit Ethernet Controller in a
1104	* convenient way.
1105	* - Simple Gigabit Ethernet port operation API.
1106	* - Simple Gigabit Ethernet port data flow API.
1107	* - Data flow and operation API support per queue functionality.
1108	* - Support cached descriptors for better performance.
1109	* - Enable access to all four DRAM banks and internal SRAM memory
1110	* spaces.
1111	* - PHY access and control API.
1112	* - Port control register configuration API.
1113	* - Full control over Unicast and Multicast MAC configurations.
1114	*
1115	* Operation flow:
1116	*
1117	* Initialization phase
1118	* This phase complete the initialization of the ETH_PORT_INFO
1119	* struct.
1120	* User information regarding port configuration has to be set
1121	* prior to calling the port initialization routine. For example,
1122	* the user has to assign the port_phy_addr field which is board
1123	* depended parameter.
1124	* In this phase any port Tx/Rx activity is halted, MIB counters
1125	* are cleared, PHY address is set according to user parameter and
1126	* access to DRAM and internal SRAM memory spaces.
1127	*
1128	* Driver ring initialization
1129	* Allocating memory for the descriptor rings and buffers is not
1130	* within the scope of this driver. Thus, the user is required to
1131	* allocate memory for the descriptors ring and buffers. Those
1132	* memory parameters are used by the Rx and Tx ring initialization
1133	* routines in order to curve the descriptor linked list in a form
1134	* of a ring.
1135	* Note: Pay special attention to alignment issues when using
1136	* cached descriptors/buffers. In this phase the driver store
1137	* information in the ETH_PORT_INFO struct regarding each queue
1138	* ring.
1139	*
1140	* Driver start
1141	* This phase prepares the Ethernet port for Rx and Tx activity.
1142	* It uses the information stored in the ETH_PORT_INFO struct to
1143	* initialize the various port registers.
1144	*
1145	* Data flow:
1146	* All packet references to/from the driver are done using PKT_INFO
1147	* struct.
1148	* This struct is a unified struct used with Rx and Tx operations.
1149	* This way the user is not required to be familiar with neither
1150	* Tx nor Rx descriptors structures.
1151	* The driver's descriptors rings are management by indexes.
1152	* Those indexes controls the ring resources and used to indicate
1153	* a SW resource error:
1154	* 'current'
1155	* This index points to the current available resource for use. For
1156	* example in Rx process this index will point to the descriptor
1157	* that will be passed to the user upon calling the receive routine.
1158	* In Tx process, this index will point to the descriptor
1159	* that will be assigned with the user packet info and transmitted.
1160	* 'used'
1161	* This index points to the descriptor that need to restore its
1162	* resources. For example in Rx process, using the Rx buffer return
1163	* API will attach the buffer returned in packet info to the
1164	* descriptor pointed by 'used'. In Tx process, using the Tx
1165	* descriptor return will merely return the user packet info with
1166	* the command status of the transmitted buffer pointed by the
1167	* 'used' index. Nevertheless, it is essential to use this routine
1168	* to update the 'used' index.
1169	* 'first'
1170	* This index supports Tx Scatter-Gather. It points to the first
1171	* descriptor of a packet assembled of multiple buffers. For example
1172	* when in middle of Such packet we have a Tx resource error the
1173	* 'curr' index get the value of 'first' to indicate that the ring
1174	* returned to its state before trying to transmit this packet.
1175	*
1176	* Receive operation:
1177	* The eth_port_receive API set the packet information struct,
1178	* passed by the caller, with received information from the
1179	* 'current' SDMA descriptor.
1180	* It is the user responsibility to return this resource back
1181	* to the Rx descriptor ring to enable the reuse of this source.
1182	* Return Rx resource is done using the eth_rx_return_buff API.
1183	*
1184	* Transmit operation:
1185	* The eth_port_send API supports Scatter-Gather which enables to
1186	* send a packet spanned over multiple buffers. This means that
1187	* for each packet info structure given by the user and put into
1188	* the Tx descriptors ring, will be transmitted only if the 'LAST'
1189	* bit will be set in the packet info command status field. This
1190	* API also consider restriction regarding buffer alignments and
1191	* sizes.
1192	* The user must return a Tx resource after ensuring the buffer
1193	* has been transmitted to enable the Tx ring indexes to update.
1194	*
1195	* BOARD LAYOUT
1196	* This device is on-board. No jumper diagram is necessary.
1197	*
1198	* EXTERNAL INTERFACE
1199	*
1200	* Prior to calling the initialization routine eth_port_init() the user
1201	* must set the following fields under ETH_PORT_INFO struct:
1202	* port_num User Ethernet port number.
1203	* port_phy_addr User PHY address of Ethernet port.
1204	* port_mac_addr[6] User defined port MAC address.
1205	* port_config User port configuration value.
1206	* port_config_extend User port config extend value.
1207	* port_sdma_config User port SDMA config value.
1208	* port_serial_control User port serial control value.
1209	* *port_virt_to_phys () User function to cast virtual addr to CPU bus addr.
1210	* *port_private User scratch pad for user specific data structures.
1211	*
1212	* This driver introduce a set of default values:
1213	* PORT_CONFIG_VALUE Default port configuration value
1214	* PORT_CONFIG_EXTEND_VALUE Default port extend configuration value
1215	* PORT_SDMA_CONFIG_VALUE Default sdma control value
1216	* PORT_SERIAL_CONTROL_VALUE Default port serial control value
1217	*
1218	* This driver data flow is done using the PKT_INFO struct which is
1219	* a unified struct for Rx and Tx operations:
1220	* byte_cnt Tx/Rx descriptor buffer byte count.
1221	* l4i_chk CPU provided TCP Checksum. For Tx operation only.
1222	* cmd_sts Tx/Rx descriptor command status.
1223	* buf_ptr Tx/Rx descriptor buffer pointer.
1224	* return_info Tx/Rx user resource return information.
1225	*
1226	*
1227	* EXTERNAL SUPPORT REQUIREMENTS
1228	*
1229	* This driver requires the following external support:
1230	*
1231	* D_CACHE_FLUSH_LINE (address, address offset)
1232	*
1233	* This macro applies assembly code to flush and invalidate cache
1234	* line.
1235	* address - address base.
1236	* address offset - address offset
1237	*
1238	*
1239	* CPU_PIPE_FLUSH
1240	*
1241	* This macro applies assembly code to flush the CPU pipeline.
1242	*
1243	*******************************************************************************/
1244	/* includes */
1245
1246	/* defines */
1247	/* SDMA command macros */
1248	#define ETH_ENABLE_TX_QUEUE(tx_queue, eth_port) \
1249	MV_REG_WRITE(MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port), (1 << tx_queue))
1250
1251	#define ETH_DISABLE_TX_QUEUE(tx_queue, eth_port) \
1252	MV_REG_WRITE(MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG(eth_port),\
1253	(1 << (8 + tx_queue)))
1254
1255	#define ETH_ENABLE_RX_QUEUE(rx_queue, eth_port) \
1256	MV_REG_WRITE(MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << rx_queue))
1257
1258	#define ETH_DISABLE_RX_QUEUE(rx_queue, eth_port) \
1259	MV_REG_WRITE(MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG(eth_port), (1 << (8 + rx_queue)))
1260
1261	#define CURR_RFD_GET(p_curr_desc, queue) \
1262	((p_curr_desc) = p_eth_port_ctrl->p_rx_curr_desc_q[queue])
1263
1264	#define CURR_RFD_SET(p_curr_desc, queue) \
1265	(p_eth_port_ctrl->p_rx_curr_desc_q[queue] = (p_curr_desc))
1266
1267	#define USED_RFD_GET(p_used_desc, queue) \
1268	((p_used_desc) = p_eth_port_ctrl->p_rx_used_desc_q[queue])
1269
1270	#define USED_RFD_SET(p_used_desc, queue)\
1271	(p_eth_port_ctrl->p_rx_used_desc_q[queue] = (p_used_desc))
1272
1273
1274	#define CURR_TFD_GET(p_curr_desc, queue) \
1275	((p_curr_desc) = p_eth_port_ctrl->p_tx_curr_desc_q[queue])
1276
1277	#define CURR_TFD_SET(p_curr_desc, queue) \
1278	(p_eth_port_ctrl->p_tx_curr_desc_q[queue] = (p_curr_desc))
1279
1280	#define USED_TFD_GET(p_used_desc, queue) \
1281	((p_used_desc) = p_eth_port_ctrl->p_tx_used_desc_q[queue])
1282
1283	#define USED_TFD_SET(p_used_desc, queue) \
1284	(p_eth_port_ctrl->p_tx_used_desc_q[queue] = (p_used_desc))
1285
1286	#define FIRST_TFD_GET(p_first_desc, queue) \
1287	((p_first_desc) = p_eth_port_ctrl->p_tx_first_desc_q[queue])
1288
1289	#define FIRST_TFD_SET(p_first_desc, queue) \
1290	(p_eth_port_ctrl->p_tx_first_desc_q[queue] = (p_first_desc))
1291
1292
1293	/* Macros that save access to desc in order to find next desc pointer */
1294	#define RX_NEXT_DESC_PTR(p_rx_desc, queue) (ETH_RX_DESC*)(((((unsigned int)p_rx_desc - (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue]) + RX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->rx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_rx_desc_area_base[queue])
1295
1296	#define TX_NEXT_DESC_PTR(p_tx_desc, queue) (ETH_TX_DESC*)(((((unsigned int)p_tx_desc - (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue]) + TX_DESC_ALIGNED_SIZE) % p_eth_port_ctrl->tx_desc_area_size[queue]) + (unsigned int)p_eth_port_ctrl->p_tx_desc_area_base[queue])
1297
1298	#define LINK_UP_TIMEOUT 100000
1299	#define PHY_BUSY_TIMEOUT 10000000
1300
1301	/* locals */
1302
1303	/* PHY routines */
1304	static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr);
1305	static int ethernet_phy_get (ETH_PORT eth_port_num);
1306
1307	/* Ethernet Port routines */
1308	static void eth_set_access_control (ETH_PORT eth_port_num,
1309	ETH_WIN_PARAM * param);
1310	static bool eth_port_uc_addr (ETH_PORT eth_port_num, unsigned char uc_nibble,
1311	ETH_QUEUE queue, int option);
1312	#if 0 /* FIXME */
1313	static bool eth_port_smc_addr (ETH_PORT eth_port_num,
1314	unsigned char mc_byte,
1315	ETH_QUEUE queue, int option);
1316	static bool eth_port_omc_addr (ETH_PORT eth_port_num,
1317	unsigned char crc8,
1318	ETH_QUEUE queue, int option);
1319	#endif
1320
1321	static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
1322	int byte_count);
1323
1324	void eth_dbg (ETH_PORT_INFO * p_eth_port_ctrl);
1325
1326
1327	typedef enum _memory_bank { BANK0, BANK1, BANK2, BANK3 } MEMORY_BANK;
1328	u32 mv_get_dram_bank_base_addr (MEMORY_BANK bank)
1329	{
1330	u32 result = 0;
1331	u32 enable = MV_REG_READ (MV64360_BASE_ADDR_ENABLE);
1332
1333	if (enable & (1 << bank))
1334	return 0;
1335	if (bank == BANK0)
1336	result = MV_REG_READ (MV64360_CS_0_BASE_ADDR);
1337	if (bank == BANK1)
1338	result = MV_REG_READ (MV64360_CS_1_BASE_ADDR);
1339	if (bank == BANK2)
1340	result = MV_REG_READ (MV64360_CS_2_BASE_ADDR);
1341	if (bank == BANK3)
1342	result = MV_REG_READ (MV64360_CS_3_BASE_ADDR);
1343	result &= 0x0000ffff;
1344	result = result << 16;
1345	return result;
1346	}
1347
1348	u32 mv_get_dram_bank_size (MEMORY_BANK bank)
1349	{
1350	u32 result = 0;
1351	u32 enable = MV_REG_READ (MV64360_BASE_ADDR_ENABLE);
1352
1353	if (enable & (1 << bank))
1354	return 0;
1355	if (bank == BANK0)
1356	result = MV_REG_READ (MV64360_CS_0_SIZE);
1357	if (bank == BANK1)
1358	result = MV_REG_READ (MV64360_CS_1_SIZE);
1359	if (bank == BANK2)
1360	result = MV_REG_READ (MV64360_CS_2_SIZE);
1361	if (bank == BANK3)
1362	result = MV_REG_READ (MV64360_CS_3_SIZE);
1363	result += 1;
1364	result &= 0x0000ffff;
1365	result = result << 16;
1366	return result;
1367	}
1368
1369	u32 mv_get_internal_sram_base (void)
1370	{
1371	u32 result;
1372
1373	result = MV_REG_READ (MV64360_INTEGRATED_SRAM_BASE_ADDR);
1374	result &= 0x0000ffff;
1375	result = result << 16;
1376	return result;
1377	}
1378
1379	/*******************************************************************************
1380	* eth_port_init - Initialize the Ethernet port driver
1381	*
1382	* DESCRIPTION:
1383	* This function prepares the ethernet port to start its activity:
1384	* 1) Completes the ethernet port driver struct initialization toward port
1385	* start routine.
1386	* 2) Resets the device to a quiescent state in case of warm reboot.
1387	* 3) Enable SDMA access to all four DRAM banks as well as internal SRAM.
1388	* 4) Clean MAC tables. The reset status of those tables is unknown.
1389	* 5) Set PHY address.
1390	* Note: Call this routine prior to eth_port_start routine and after setting
1391	* user values in the user fields of Ethernet port control struct (i.e.
1392	* port_phy_addr).
1393	*
1394	* INPUT:
1395	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet port control struct
1396	*
1397	* OUTPUT:
1398	* See description.
1399	*
1400	* RETURN:
1401	* None.
1402	*
1403	*******************************************************************************/
1404	static void eth_port_init (ETH_PORT_INFO * p_eth_port_ctrl)
1405	{
1406	int queue;
1407	ETH_WIN_PARAM win_param;
1408
1409	p_eth_port_ctrl->port_config = PORT_CONFIG_VALUE;
1410	p_eth_port_ctrl->port_config_extend = PORT_CONFIG_EXTEND_VALUE;
1411	p_eth_port_ctrl->port_sdma_config = PORT_SDMA_CONFIG_VALUE;
1412	p_eth_port_ctrl->port_serial_control = PORT_SERIAL_CONTROL_VALUE;
1413
1414	p_eth_port_ctrl->port_rx_queue_command = 0;
1415	p_eth_port_ctrl->port_tx_queue_command = 0;
1416
1417	/* Zero out SW structs */
1418	for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
1419	CURR_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
1420	USED_RFD_SET ((ETH_RX_DESC *) 0x00000000, queue);
1421	p_eth_port_ctrl->rx_resource_err[queue] = false;
1422	}
1423
1424	for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
1425	CURR_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
1426	USED_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
1427	FIRST_TFD_SET ((ETH_TX_DESC *) 0x00000000, queue);
1428	p_eth_port_ctrl->tx_resource_err[queue] = false;
1429	}
1430
1431	eth_port_reset (p_eth_port_ctrl->port_num);
1432
1433	/* Set access parameters for DRAM bank 0 */
1434	win_param.win = ETH_WIN0; /* Use Ethernet window 0 */
1435	win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
1436	win_param.attributes = EBAR_ATTR_DRAM_CS0; /* Enable DRAM bank */
1437	#ifndef CONFIG_NOT_COHERENT_CACHE
1438	win_param.attributes \|= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
1439	#endif
1440	win_param.high_addr = 0;
1441	/* Get bank base */
1442	win_param.base_addr = mv_get_dram_bank_base_addr (BANK0);
1443	win_param.size = mv_get_dram_bank_size (BANK0); /* Get bank size */
1444	if (win_param.size == 0)
1445	win_param.enable = 0;
1446	else
1447	win_param.enable = 1; /* Enable the access */
1448	win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
1449
1450	/* Set the access control for address window (EPAPR) READ & WRITE */
1451	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
1452
1453	/* Set access parameters for DRAM bank 1 */
1454	win_param.win = ETH_WIN1; /* Use Ethernet window 1 */
1455	win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
1456	win_param.attributes = EBAR_ATTR_DRAM_CS1; /* Enable DRAM bank */
1457	#ifndef CONFIG_NOT_COHERENT_CACHE
1458	win_param.attributes \|= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
1459	#endif
1460	win_param.high_addr = 0;
1461	/* Get bank base */
1462	win_param.base_addr = mv_get_dram_bank_base_addr (BANK1);
1463	win_param.size = mv_get_dram_bank_size (BANK1); /* Get bank size */
1464	if (win_param.size == 0)
1465	win_param.enable = 0;
1466	else
1467	win_param.enable = 1; /* Enable the access */
1468	win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
1469
1470	/* Set the access control for address window (EPAPR) READ & WRITE */
1471	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
1472
1473	/* Set access parameters for DRAM bank 2 */
1474	win_param.win = ETH_WIN2; /* Use Ethernet window 2 */
1475	win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
1476	win_param.attributes = EBAR_ATTR_DRAM_CS2; /* Enable DRAM bank */
1477	#ifndef CONFIG_NOT_COHERENT_CACHE
1478	win_param.attributes \|= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
1479	#endif
1480	win_param.high_addr = 0;
1481	/* Get bank base */
1482	win_param.base_addr = mv_get_dram_bank_base_addr (BANK2);
1483	win_param.size = mv_get_dram_bank_size (BANK2); /* Get bank size */
1484	if (win_param.size == 0)
1485	win_param.enable = 0;
1486	else
1487	win_param.enable = 1; /* Enable the access */
1488	win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
1489
1490	/* Set the access control for address window (EPAPR) READ & WRITE */
1491	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
1492
1493	/* Set access parameters for DRAM bank 3 */
1494	win_param.win = ETH_WIN3; /* Use Ethernet window 3 */
1495	win_param.target = ETH_TARGET_DRAM; /* Window target - DDR */
1496	win_param.attributes = EBAR_ATTR_DRAM_CS3; /* Enable DRAM bank */
1497	#ifndef CONFIG_NOT_COHERENT_CACHE
1498	win_param.attributes \|= EBAR_ATTR_DRAM_CACHE_COHERENCY_WB;
1499	#endif
1500	win_param.high_addr = 0;
1501	/* Get bank base */
1502	win_param.base_addr = mv_get_dram_bank_base_addr (BANK3);
1503	win_param.size = mv_get_dram_bank_size (BANK3); /* Get bank size */
1504	if (win_param.size == 0)
1505	win_param.enable = 0;
1506	else
1507	win_param.enable = 1; /* Enable the access */
1508	win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
1509
1510	/* Set the access control for address window (EPAPR) READ & WRITE */
1511	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
1512
1513	/* Set access parameters for Internal SRAM */
1514	win_param.win = ETH_WIN4; /* Use Ethernet window 0 */
1515	win_param.target = EBAR_TARGET_CBS; /* Target - Internal SRAM */
1516	win_param.attributes = EBAR_ATTR_CBS_SRAM \| EBAR_ATTR_CBS_SRAM_BLOCK0;
1517	win_param.high_addr = 0;
1518	win_param.base_addr = mv_get_internal_sram_base (); /* Get base addr */
1519	win_param.size = MV64360_INTERNAL_SRAM_SIZE; /* Get bank size */
1520	win_param.enable = 1; /* Enable the access */
1521	win_param.access_ctrl = EWIN_ACCESS_FULL; /* Enable full access */
1522
1523	/* Set the access control for address window (EPAPR) READ & WRITE */
1524	eth_set_access_control (p_eth_port_ctrl->port_num, &win_param);
1525
1526	eth_port_init_mac_tables (p_eth_port_ctrl->port_num);
1527
1528	ethernet_phy_set (p_eth_port_ctrl->port_num,
1529	p_eth_port_ctrl->port_phy_addr);
1530
1531	return;
1532
1533	}
1534
1535	/*******************************************************************************
1536	* eth_port_start - Start the Ethernet port activity.
1537	*
1538	* DESCRIPTION:
1539	* This routine prepares the Ethernet port for Rx and Tx activity:
1540	* 1. Initialize Tx and Rx Current Descriptor Pointer for each queue that
1541	* has been initialized a descriptor's ring (using ether_init_tx_desc_ring
1542	* for Tx and ether_init_rx_desc_ring for Rx)
1543	* 2. Initialize and enable the Ethernet configuration port by writing to
1544	* the port's configuration and command registers.
1545	* 3. Initialize and enable the SDMA by writing to the SDMA's
1546	* configuration and command registers.
1547	* After completing these steps, the ethernet port SDMA can starts to
1548	* perform Rx and Tx activities.
1549	*
1550	* Note: Each Rx and Tx queue descriptor's list must be initialized prior
1551	* to calling this function (use ether_init_tx_desc_ring for Tx queues and
1552	* ether_init_rx_desc_ring for Rx queues).
1553	*
1554	* INPUT:
1555	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet port control struct
1556	*
1557	* OUTPUT:
1558	* Ethernet port is ready to receive and transmit.
1559	*
1560	* RETURN:
1561	* false if the port PHY is not up.
1562	* true otherwise.
1563	*
1564	*******************************************************************************/
1565	static bool eth_port_start (ETH_PORT_INFO * p_eth_port_ctrl)
1566	{
1567	int queue;
1568	volatile ETH_TX_DESC *p_tx_curr_desc;
1569	volatile ETH_RX_DESC *p_rx_curr_desc;
1570	unsigned int phy_reg_data;
1571	ETH_PORT eth_port_num = p_eth_port_ctrl->port_num;
1572
1573
1574	/* Assignment of Tx CTRP of given queue */
1575	for (queue = 0; queue < MAX_TX_QUEUE_NUM; queue++) {
1576	CURR_TFD_GET (p_tx_curr_desc, queue);
1577	MV_REG_WRITE ((MV64360_ETH_TX_CURRENT_QUEUE_DESC_PTR_0
1578	(eth_port_num)
1579	+ (4 * queue)),
1580	((unsigned int) p_tx_curr_desc));
1581
1582	}
1583
1584	/* Assignment of Rx CRDP of given queue */
1585	for (queue = 0; queue < MAX_RX_QUEUE_NUM; queue++) {
1586	CURR_RFD_GET (p_rx_curr_desc, queue);
1587	MV_REG_WRITE ((MV64360_ETH_RX_CURRENT_QUEUE_DESC_PTR_0
1588	(eth_port_num)
1589	+ (4 * queue)),
1590	((unsigned int) p_rx_curr_desc));
1591
1592	if (p_rx_curr_desc != NULL)
1593	/* Add the assigned Ethernet address to the port's address table */
1594	eth_port_uc_addr_set (p_eth_port_ctrl->port_num,
1595	p_eth_port_ctrl->port_mac_addr,
1596	queue);
1597	}
1598
1599	/* Assign port configuration and command. */
1600	MV_REG_WRITE (MV64360_ETH_PORT_CONFIG_REG (eth_port_num),
1601	p_eth_port_ctrl->port_config);
1602
1603	MV_REG_WRITE (MV64360_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
1604	p_eth_port_ctrl->port_config_extend);
1605
1606	MV_REG_WRITE (MV64360_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
1607	p_eth_port_ctrl->port_serial_control);
1608
1609	MV_SET_REG_BITS (MV64360_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
1610	ETH_SERIAL_PORT_ENABLE);
1611
1612	/* Assign port SDMA configuration */
1613	MV_REG_WRITE (MV64360_ETH_SDMA_CONFIG_REG (eth_port_num),
1614	p_eth_port_ctrl->port_sdma_config);
1615
1616	MV_REG_WRITE (MV64360_ETH_TX_QUEUE_0_TOKEN_BUCKET_COUNT
1617	(eth_port_num), 0x3fffffff);
1618	MV_REG_WRITE (MV64360_ETH_TX_QUEUE_0_TOKEN_BUCKET_CONFIG
1619	(eth_port_num), 0x03fffcff);
1620	/* Turn off the port/queue bandwidth limitation */
1621	MV_REG_WRITE (MV64360_ETH_MAXIMUM_TRANSMIT_UNIT (eth_port_num), 0x0);
1622
1623	/* Enable port Rx. */
1624	MV_REG_WRITE (MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG (eth_port_num),
1625	p_eth_port_ctrl->port_rx_queue_command);
1626
1627	/* Check if link is up */
1628	eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
1629
1630	if (!(phy_reg_data & 0x20))
1631	return false;
1632
1633	return true;
1634	}
1635
1636	/*******************************************************************************
1637	* eth_port_uc_addr_set - This function Set the port Unicast address.
1638	*
1639	* DESCRIPTION:
1640	* This function Set the port Ethernet MAC address.
1641	*
1642	* INPUT:
1643	* ETH_PORT eth_port_num Port number.
1644	* char * p_addr Address to be set
1645	* ETH_QUEUE queue Rx queue number for this MAC address.
1646	*
1647	* OUTPUT:
1648	* Set MAC address low and high registers. also calls eth_port_uc_addr()
1649	* To set the unicast table with the proper information.
1650	*
1651	* RETURN:
1652	* N/A.
1653	*
1654	*******************************************************************************/
1655	static void eth_port_uc_addr_set (ETH_PORT eth_port_num,
1656	unsigned char *p_addr, ETH_QUEUE queue)
1657	{
1658	unsigned int mac_h;
1659	unsigned int mac_l;
1660
1661	mac_l = (p_addr[4] << 8) \| (p_addr[5]);
1662	mac_h = (p_addr[0] << 24) \| (p_addr[1] << 16) \|
1663	(p_addr[2] << 8) \| (p_addr[3] << 0);
1664
1665	MV_REG_WRITE (MV64360_ETH_MAC_ADDR_LOW (eth_port_num), mac_l);
1666	MV_REG_WRITE (MV64360_ETH_MAC_ADDR_HIGH (eth_port_num), mac_h);
1667
1668	/* Accept frames of this address */
1669	eth_port_uc_addr (eth_port_num, p_addr[5], queue, ACCEPT_MAC_ADDR);
1670
1671	return;
1672	}
1673
1674	/*******************************************************************************
1675	* eth_port_uc_addr - This function Set the port unicast address table
1676	*
1677	* DESCRIPTION:
1678	* This function locates the proper entry in the Unicast table for the
1679	* specified MAC nibble and sets its properties according to function
1680	* parameters.
1681	*
1682	* INPUT:
1683	* ETH_PORT eth_port_num Port number.
1684	* unsigned char uc_nibble Unicast MAC Address last nibble.
1685	* ETH_QUEUE queue Rx queue number for this MAC address.
1686	* int option 0 = Add, 1 = remove address.
1687	*
1688	* OUTPUT:
1689	* This function add/removes MAC addresses from the port unicast address
1690	* table.
1691	*
1692	* RETURN:
1693	* true is output succeeded.
1694	* false if option parameter is invalid.
1695	*
1696	*******************************************************************************/
1697	static bool eth_port_uc_addr (ETH_PORT eth_port_num,
1698	unsigned char uc_nibble,
1699	ETH_QUEUE queue, int option)
1700	{
1701	unsigned int unicast_reg;
1702	unsigned int tbl_offset;
1703	unsigned int reg_offset;
1704
1705	/* Locate the Unicast table entry */
1706	uc_nibble = (0xf & uc_nibble);
1707	tbl_offset = (uc_nibble / 4) * 4; /* Register offset from unicast table base */
1708	reg_offset = uc_nibble % 4; /* Entry offset within the above register */
1709
1710	switch (option) {
1711	case REJECT_MAC_ADDR:
1712	/* Clear accepts frame bit at specified unicast DA table entry */
1713	unicast_reg =
1714	MV_REG_READ ((MV64360_ETH_DA_FILTER_UNICAST_TABLE_BASE
1715	(eth_port_num)
1716	+ tbl_offset));
1717
1718	unicast_reg &= (0x0E << (8 * reg_offset));
1719
1720	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_UNICAST_TABLE_BASE
1721	(eth_port_num)
1722	+ tbl_offset), unicast_reg);
1723	break;
1724
1725	case ACCEPT_MAC_ADDR:
1726	/* Set accepts frame bit at unicast DA filter table entry */
1727	unicast_reg =
1728	MV_REG_READ ((MV64360_ETH_DA_FILTER_UNICAST_TABLE_BASE
1729	(eth_port_num)
1730	+ tbl_offset));
1731
1732	unicast_reg \|= ((0x01 \| queue) << (8 * reg_offset));
1733
1734	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_UNICAST_TABLE_BASE
1735	(eth_port_num)
1736	+ tbl_offset), unicast_reg);
1737
1738	break;
1739
1740	default:
1741	return false;
1742	}
1743	return true;
1744	}
1745
1746	#if 0 /* FIXME */
1747	/*******************************************************************************
1748	* eth_port_mc_addr - Multicast address settings.
1749	*
1750	* DESCRIPTION:
1751	* This API controls the MV device MAC multicast support.
1752	* The MV device supports multicast using two tables:
1753	* 1) Special Multicast Table for MAC addresses of the form
1754	* 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
1755	* The MAC DA[7:0] bits are used as a pointer to the Special Multicast
1756	* Table entries in the DA-Filter table.
1757	* In this case, the function calls eth_port_smc_addr() routine to set the
1758	* Special Multicast Table.
1759	* 2) Other Multicast Table for multicast of another type. A CRC-8bit
1760	* is used as an index to the Other Multicast Table entries in the
1761	* DA-Filter table.
1762	* In this case, the function calculates the CRC-8bit value and calls
1763	* eth_port_omc_addr() routine to set the Other Multicast Table.
1764	* INPUT:
1765	* ETH_PORT eth_port_num Port number.
1766	* unsigned char *p_addr Unicast MAC Address.
1767	* ETH_QUEUE queue Rx queue number for this MAC address.
1768	* int option 0 = Add, 1 = remove address.
1769	*
1770	* OUTPUT:
1771	* See description.
1772	*
1773	* RETURN:
1774	* true is output succeeded.
1775	* false if add_address_table_entry( ) failed.
1776	*
1777	*******************************************************************************/
1778	static void eth_port_mc_addr (ETH_PORT eth_port_num,
1779	unsigned char *p_addr,
1780	ETH_QUEUE queue, int option)
1781	{
1782	unsigned int mac_h;
1783	unsigned int mac_l;
1784	unsigned char crc_result = 0;
1785	int mac_array[48];
1786	int crc[8];
1787	int i;
1788
1789
1790	if ((p_addr[0] == 0x01) &&
1791	(p_addr[1] == 0x00) &&
1792	(p_addr[2] == 0x5E) && (p_addr[3] == 0x00) && (p_addr[4] == 0x00))
1793
1794	eth_port_smc_addr (eth_port_num, p_addr[5], queue, option);
1795	else {
1796	/* Calculate CRC-8 out of the given address */
1797	mac_h = (p_addr[0] << 8) \| (p_addr[1]);
1798	mac_l = (p_addr[2] << 24) \| (p_addr[3] << 16) \|
1799	(p_addr[4] << 8) \| (p_addr[5] << 0);
1800
1801	for (i = 0; i < 32; i++)
1802	mac_array[i] = (mac_l >> i) & 0x1;
1803	for (i = 32; i < 48; i++)
1804	mac_array[i] = (mac_h >> (i - 32)) & 0x1;
1805
1806
1807	crc[0] = mac_array[45] ^ mac_array[43] ^ mac_array[40] ^
1808	mac_array[39] ^ mac_array[35] ^ mac_array[34] ^
1809	mac_array[31] ^ mac_array[30] ^ mac_array[28] ^
1810	mac_array[23] ^ mac_array[21] ^ mac_array[19] ^
1811	mac_array[18] ^ mac_array[16] ^ mac_array[14] ^
1812	mac_array[12] ^ mac_array[8] ^ mac_array[7] ^
1813	mac_array[6] ^ mac_array[0];
1814
1815	crc[1] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
1816	mac_array[43] ^ mac_array[41] ^ mac_array[39] ^
1817	mac_array[36] ^ mac_array[34] ^ mac_array[32] ^
1818	mac_array[30] ^ mac_array[29] ^ mac_array[28] ^
1819	mac_array[24] ^ mac_array[23] ^ mac_array[22] ^
1820	mac_array[21] ^ mac_array[20] ^ mac_array[18] ^
1821	mac_array[17] ^ mac_array[16] ^ mac_array[15] ^
1822	mac_array[14] ^ mac_array[13] ^ mac_array[12] ^
1823	mac_array[9] ^ mac_array[6] ^ mac_array[1] ^
1824	mac_array[0];
1825
1826	crc[2] = mac_array[47] ^ mac_array[46] ^ mac_array[44] ^
1827	mac_array[43] ^ mac_array[42] ^ mac_array[39] ^
1828	mac_array[37] ^ mac_array[34] ^ mac_array[33] ^
1829	mac_array[29] ^ mac_array[28] ^ mac_array[25] ^
1830	mac_array[24] ^ mac_array[22] ^ mac_array[17] ^
1831	mac_array[15] ^ mac_array[13] ^ mac_array[12] ^
1832	mac_array[10] ^ mac_array[8] ^ mac_array[6] ^
1833	mac_array[2] ^ mac_array[1] ^ mac_array[0];
1834
1835	crc[3] = mac_array[47] ^ mac_array[45] ^ mac_array[44] ^
1836	mac_array[43] ^ mac_array[40] ^ mac_array[38] ^
1837	mac_array[35] ^ mac_array[34] ^ mac_array[30] ^
1838	mac_array[29] ^ mac_array[26] ^ mac_array[25] ^
1839	mac_array[23] ^ mac_array[18] ^ mac_array[16] ^
1840	mac_array[14] ^ mac_array[13] ^ mac_array[11] ^
1841	mac_array[9] ^ mac_array[7] ^ mac_array[3] ^
1842	mac_array[2] ^ mac_array[1];
1843
1844	crc[4] = mac_array[46] ^ mac_array[45] ^ mac_array[44] ^
1845	mac_array[41] ^ mac_array[39] ^ mac_array[36] ^
1846	mac_array[35] ^ mac_array[31] ^ mac_array[30] ^
1847	mac_array[27] ^ mac_array[26] ^ mac_array[24] ^
1848	mac_array[19] ^ mac_array[17] ^ mac_array[15] ^
1849	mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
1850	mac_array[8] ^ mac_array[4] ^ mac_array[3] ^
1851	mac_array[2];
1852
1853	crc[5] = mac_array[47] ^ mac_array[46] ^ mac_array[45] ^
1854	mac_array[42] ^ mac_array[40] ^ mac_array[37] ^
1855	mac_array[36] ^ mac_array[32] ^ mac_array[31] ^
1856	mac_array[28] ^ mac_array[27] ^ mac_array[25] ^
1857	mac_array[20] ^ mac_array[18] ^ mac_array[16] ^
1858	mac_array[15] ^ mac_array[13] ^ mac_array[11] ^
1859	mac_array[9] ^ mac_array[5] ^ mac_array[4] ^
1860	mac_array[3];
1861
1862	crc[6] = mac_array[47] ^ mac_array[46] ^ mac_array[43] ^
1863	mac_array[41] ^ mac_array[38] ^ mac_array[37] ^
1864	mac_array[33] ^ mac_array[32] ^ mac_array[29] ^
1865	mac_array[28] ^ mac_array[26] ^ mac_array[21] ^
1866	mac_array[19] ^ mac_array[17] ^ mac_array[16] ^
1867	mac_array[14] ^ mac_array[12] ^ mac_array[10] ^
1868	mac_array[6] ^ mac_array[5] ^ mac_array[4];
1869
1870	crc[7] = mac_array[47] ^ mac_array[44] ^ mac_array[42] ^
1871	mac_array[39] ^ mac_array[38] ^ mac_array[34] ^
1872	mac_array[33] ^ mac_array[30] ^ mac_array[29] ^
1873	mac_array[27] ^ mac_array[22] ^ mac_array[20] ^
1874	mac_array[18] ^ mac_array[17] ^ mac_array[15] ^
1875	mac_array[13] ^ mac_array[11] ^ mac_array[7] ^
1876	mac_array[6] ^ mac_array[5];
1877
1878	for (i = 0; i < 8; i++)
1879	crc_result = crc_result \| (crc[i] << i);
1880
1881	eth_port_omc_addr (eth_port_num, crc_result, queue, option);
1882	}
1883	return;
1884	}
1885
1886	/*******************************************************************************
1887	* eth_port_smc_addr - Special Multicast address settings.
1888	*
1889	* DESCRIPTION:
1890	* This routine controls the MV device special MAC multicast support.
1891	* The Special Multicast Table for MAC addresses supports MAC of the form
1892	* 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0x_fF).
1893	* The MAC DA[7:0] bits are used as a pointer to the Special Multicast
1894	* Table entries in the DA-Filter table.
1895	* This function set the Special Multicast Table appropriate entry
1896	* according to the argument given.
1897	*
1898	* INPUT:
1899	* ETH_PORT eth_port_num Port number.
1900	* unsigned char mc_byte Multicast addr last byte (MAC DA[7:0] bits).
1901	* ETH_QUEUE queue Rx queue number for this MAC address.
1902	* int option 0 = Add, 1 = remove address.
1903	*
1904	* OUTPUT:
1905	* See description.
1906	*
1907	* RETURN:
1908	* true is output succeeded.
1909	* false if option parameter is invalid.
1910	*
1911	*******************************************************************************/
1912	static bool eth_port_smc_addr (ETH_PORT eth_port_num,
1913	unsigned char mc_byte,
1914	ETH_QUEUE queue, int option)
1915	{
1916	unsigned int smc_table_reg;
1917	unsigned int tbl_offset;
1918	unsigned int reg_offset;
1919
1920	/* Locate the SMC table entry */
1921	tbl_offset = (mc_byte / 4) * 4; /* Register offset from SMC table base */
1922	reg_offset = mc_byte % 4; /* Entry offset within the above register */
1923	queue &= 0x7;
1924
1925	switch (option) {
1926	case REJECT_MAC_ADDR:
1927	/* Clear accepts frame bit at specified Special DA table entry */
1928	smc_table_reg =
1929	MV_REG_READ ((MV64360_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
1930	smc_table_reg &= (0x0E << (8 * reg_offset));
1931
1932	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
1933	break;
1934
1935	case ACCEPT_MAC_ADDR:
1936	/* Set accepts frame bit at specified Special DA table entry */
1937	smc_table_reg =
1938	MV_REG_READ ((MV64360_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
1939	smc_table_reg \|= ((0x01 \| queue) << (8 * reg_offset));
1940
1941	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), smc_table_reg);
1942	break;
1943
1944	default:
1945	return false;
1946	}
1947	return true;
1948	}
1949
1950	/*******************************************************************************
1951	* eth_port_omc_addr - Multicast address settings.
1952	*
1953	* DESCRIPTION:
1954	* This routine controls the MV device Other MAC multicast support.
1955	* The Other Multicast Table is used for multicast of another type.
1956	* A CRC-8bit is used as an index to the Other Multicast Table entries
1957	* in the DA-Filter table.
1958	* The function gets the CRC-8bit value from the calling routine and
1959	* set the Other Multicast Table appropriate entry according to the
1960	* CRC-8 argument given.
1961	*
1962	* INPUT:
1963	* ETH_PORT eth_port_num Port number.
1964	* unsigned char crc8 A CRC-8bit (Polynomial: x^8+x^2+x^1+1).
1965	* ETH_QUEUE queue Rx queue number for this MAC address.
1966	* int option 0 = Add, 1 = remove address.
1967	*
1968	* OUTPUT:
1969	* See description.
1970	*
1971	* RETURN:
1972	* true is output succeeded.
1973	* false if option parameter is invalid.
1974	*
1975	*******************************************************************************/
1976	static bool eth_port_omc_addr (ETH_PORT eth_port_num,
1977	unsigned char crc8,
1978	ETH_QUEUE queue, int option)
1979	{
1980	unsigned int omc_table_reg;
1981	unsigned int tbl_offset;
1982	unsigned int reg_offset;
1983
1984	/* Locate the OMC table entry */
1985	tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */
1986	reg_offset = crc8 % 4; /* Entry offset within the above register */
1987	queue &= 0x7;
1988
1989	switch (option) {
1990	case REJECT_MAC_ADDR:
1991	/* Clear accepts frame bit at specified Other DA table entry */
1992	omc_table_reg =
1993	MV_REG_READ ((MV64360_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
1994	omc_table_reg &= (0x0E << (8 * reg_offset));
1995
1996	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
1997	break;
1998
1999	case ACCEPT_MAC_ADDR:
2000	/* Set accepts frame bit at specified Other DA table entry */
2001	omc_table_reg =
2002	MV_REG_READ ((MV64360_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset));
2003	omc_table_reg \|= ((0x01 \| queue) << (8 * reg_offset));
2004
2005	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + tbl_offset), omc_table_reg);
2006	break;
2007
2008	default:
2009	return false;
2010	}
2011	return true;
2012	}
2013	#endif
2014
2015	/*******************************************************************************
2016	* eth_port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
2017	*
2018	* DESCRIPTION:
2019	* Go through all the DA filter tables (Unicast, Special Multicast & Other
2020	* Multicast) and set each entry to 0.
2021	*
2022	* INPUT:
2023	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2024	*
2025	* OUTPUT:
2026	* Multicast and Unicast packets are rejected.
2027	*
2028	* RETURN:
2029	* None.
2030	*
2031	*******************************************************************************/
2032	static void eth_port_init_mac_tables (ETH_PORT eth_port_num)
2033	{
2034	int table_index;
2035
2036	/* Clear DA filter unicast table (Ex_dFUT) */
2037	for (table_index = 0; table_index <= 0xC; table_index += 4)
2038	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_UNICAST_TABLE_BASE
2039	(eth_port_num) + table_index), 0);
2040
2041	for (table_index = 0; table_index <= 0xFC; table_index += 4) {
2042	/* Clear DA filter special multicast table (Ex_dFSMT) */
2043	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_SPECIAL_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
2044	/* Clear DA filter other multicast table (Ex_dFOMT) */
2045	MV_REG_WRITE ((MV64360_ETH_DA_FILTER_OTHER_MULTICAST_TABLE_BASE (eth_port_num) + table_index), 0);
2046	}
2047	}
2048
2049	/*******************************************************************************
2050	* eth_clear_mib_counters - Clear all MIB counters
2051	*
2052	* DESCRIPTION:
2053	* This function clears all MIB counters of a specific ethernet port.
2054	* A read from the MIB counter will reset the counter.
2055	*
2056	* INPUT:
2057	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2058	*
2059	* OUTPUT:
2060	* After reading all MIB counters, the counters resets.
2061	*
2062	* RETURN:
2063	* MIB counter value.
2064	*
2065	*******************************************************************************/
2066	static void eth_clear_mib_counters (ETH_PORT eth_port_num)
2067	{
2068	int i;
2069	unsigned int dummy;
2070
2071	/* Perform dummy reads from MIB counters */
2072	for (i = ETH_MIB_GOOD_OCTETS_RECEIVED_LOW; i < ETH_MIB_LATE_COLLISION;
2073	i += 4)
2074	dummy = MV_REG_READ ((MV64360_ETH_MIB_COUNTERS_BASE
2075	(eth_port_num) + i));
2076
2077	return;
2078	}
2079
2080	/*******************************************************************************
2081	* eth_read_mib_counter - Read a MIB counter
2082	*
2083	* DESCRIPTION:
2084	* This function reads a MIB counter of a specific ethernet port.
2085	* NOTE - If read from ETH_MIB_GOOD_OCTETS_RECEIVED_LOW, then the
2086	* following read must be from ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH
2087	* register. The same applies for ETH_MIB_GOOD_OCTETS_SENT_LOW and
2088	* ETH_MIB_GOOD_OCTETS_SENT_HIGH
2089	*
2090	* INPUT:
2091	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2092	* unsigned int mib_offset MIB counter offset (use ETH_MIB_... macros).
2093	*
2094	* OUTPUT:
2095	* After reading the MIB counter, the counter resets.
2096	*
2097	* RETURN:
2098	* MIB counter value.
2099	*
2100	*******************************************************************************/
2101	unsigned int eth_read_mib_counter (ETH_PORT eth_port_num,
2102	unsigned int mib_offset)
2103	{
2104	return (MV_REG_READ (MV64360_ETH_MIB_COUNTERS_BASE (eth_port_num)
2105	+ mib_offset));
2106	}
2107
2108	/*******************************************************************************
2109	* ethernet_phy_set - Set the ethernet port PHY address.
2110	*
2111	* DESCRIPTION:
2112	* This routine set the ethernet port PHY address according to given
2113	* parameter.
2114	*
2115	* INPUT:
2116	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2117	*
2118	* OUTPUT:
2119	* Set PHY Address Register with given PHY address parameter.
2120	*
2121	* RETURN:
2122	* None.
2123	*
2124	*******************************************************************************/
2125	static void ethernet_phy_set (ETH_PORT eth_port_num, int phy_addr)
2126	{
2127	unsigned int reg_data;
2128
2129	reg_data = MV_REG_READ (MV64360_ETH_PHY_ADDR_REG);
2130
2131	reg_data &= ~(0x1F << (5 * eth_port_num));
2132	reg_data \|= (phy_addr << (5 * eth_port_num));
2133
2134	MV_REG_WRITE (MV64360_ETH_PHY_ADDR_REG, reg_data);
2135
2136	return;
2137	}
2138
2139	/*******************************************************************************
2140	* ethernet_phy_get - Get the ethernet port PHY address.
2141	*
2142	* DESCRIPTION:
2143	* This routine returns the given ethernet port PHY address.
2144	*
2145	* INPUT:
2146	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2147	*
2148	* OUTPUT:
2149	* None.
2150	*
2151	* RETURN:
2152	* PHY address.
2153	*
2154	*******************************************************************************/
2155	static int ethernet_phy_get (ETH_PORT eth_port_num)
2156	{
2157	unsigned int reg_data;
2158
2159	reg_data = MV_REG_READ (MV64360_ETH_PHY_ADDR_REG);
2160
2161	return ((reg_data >> (5 * eth_port_num)) & 0x1f);
2162	}
2163
2164	/*******************************************************************************
2165	* ethernet_phy_reset - Reset Ethernet port PHY.
2166	*
2167	* DESCRIPTION:
2168	* This routine utilize the SMI interface to reset the ethernet port PHY.
2169	* The routine waits until the link is up again or link up is timeout.
2170	*
2171	* INPUT:
2172	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2173	*
2174	* OUTPUT:
2175	* The ethernet port PHY renew its link.
2176	*
2177	* RETURN:
2178	* None.
2179	*
2180	*******************************************************************************/
2181	static bool ethernet_phy_reset (ETH_PORT eth_port_num)
2182	{
2183	unsigned int time_out = 50;
2184	unsigned int phy_reg_data;
2185
2186	/* Reset the PHY */
2187	eth_port_read_smi_reg (eth_port_num, 0, &phy_reg_data);
2188	phy_reg_data \|= 0x8000; /* Set bit 15 to reset the PHY */
2189	eth_port_write_smi_reg (eth_port_num, 0, phy_reg_data);
2190
2191	/* Poll on the PHY LINK */
2192	do {
2193	eth_port_read_smi_reg (eth_port_num, 1, &phy_reg_data);
2194
2195	if (time_out-- == 0)
2196	return false;
2197	}
2198	while (!(phy_reg_data & 0x20));
2199
2200	return true;
2201	}
2202
2203	/*******************************************************************************
2204	* eth_port_reset - Reset Ethernet port
2205	*
2206	* DESCRIPTION:
2207	* This routine resets the chip by aborting any SDMA engine activity and
2208	* clearing the MIB counters. The Receiver and the Transmit unit are in
2209	* idle state after this command is performed and the port is disabled.
2210	*
2211	* INPUT:
2212	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2213	*
2214	* OUTPUT:
2215	* Channel activity is halted.
2216	*
2217	* RETURN:
2218	* None.
2219	*
2220	*******************************************************************************/
2221	static void eth_port_reset (ETH_PORT eth_port_num)
2222	{
2223	unsigned int reg_data;
2224
2225	/* Stop Tx port activity. Check port Tx activity. */
2226	reg_data =
2227	MV_REG_READ (MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG
2228	(eth_port_num));
2229
2230	if (reg_data & 0xFF) {
2231	/* Issue stop command for active channels only */
2232	MV_REG_WRITE (MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG
2233	(eth_port_num), (reg_data << 8));
2234
2235	/* Wait for all Tx activity to terminate. */
2236	do {
2237	/* Check port cause register that all Tx queues are stopped */
2238	reg_data =
2239	MV_REG_READ
2240	(MV64360_ETH_TRANSMIT_QUEUE_COMMAND_REG
2241	(eth_port_num));
2242	}
2243	while (reg_data & 0xFF);
2244	}
2245
2246	/* Stop Rx port activity. Check port Rx activity. */
2247	reg_data =
2248	MV_REG_READ (MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG
2249	(eth_port_num));
2250
2251	if (reg_data & 0xFF) {
2252	/* Issue stop command for active channels only */
2253	MV_REG_WRITE (MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG
2254	(eth_port_num), (reg_data << 8));
2255
2256	/* Wait for all Rx activity to terminate. */
2257	do {
2258	/* Check port cause register that all Rx queues are stopped */
2259	reg_data =
2260	MV_REG_READ
2261	(MV64360_ETH_RECEIVE_QUEUE_COMMAND_REG
2262	(eth_port_num));
2263	}
2264	while (reg_data & 0xFF);
2265	}
2266
2267
2268	/* Clear all MIB counters */
2269	eth_clear_mib_counters (eth_port_num);
2270
2271	/* Reset the Enable bit in the Configuration Register */
2272	reg_data =
2273	MV_REG_READ (MV64360_ETH_PORT_SERIAL_CONTROL_REG
2274	(eth_port_num));
2275	reg_data &= ~ETH_SERIAL_PORT_ENABLE;
2276	MV_REG_WRITE (MV64360_ETH_PORT_SERIAL_CONTROL_REG (eth_port_num),
2277	reg_data);
2278
2279	return;
2280	}
2281
2282	#if 0 /* Not needed here */
2283	/*******************************************************************************
2284	* ethernet_set_config_reg - Set specified bits in configuration register.
2285	*
2286	* DESCRIPTION:
2287	* This function sets specified bits in the given ethernet
2288	* configuration register.
2289	*
2290	* INPUT:
2291	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2292	* unsigned int value 32 bit value.
2293	*
2294	* OUTPUT:
2295	* The set bits in the value parameter are set in the configuration
2296	* register.
2297	*
2298	* RETURN:
2299	* None.
2300	*
2301	*******************************************************************************/
2302	static void ethernet_set_config_reg (ETH_PORT eth_port_num,
2303	unsigned int value)
2304	{
2305	unsigned int eth_config_reg;
2306
2307	eth_config_reg =
2308	MV_REG_READ (MV64360_ETH_PORT_CONFIG_REG (eth_port_num));
2309	eth_config_reg \|= value;
2310	MV_REG_WRITE (MV64360_ETH_PORT_CONFIG_REG (eth_port_num),
2311	eth_config_reg);
2312
2313	return;
2314	}
2315	#endif
2316
2317	#if 0 /* FIXME */
2318	/*******************************************************************************
2319	* ethernet_reset_config_reg - Reset specified bits in configuration register.
2320	*
2321	* DESCRIPTION:
2322	* This function resets specified bits in the given Ethernet
2323	* configuration register.
2324	*
2325	* INPUT:
2326	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2327	* unsigned int value 32 bit value.
2328	*
2329	* OUTPUT:
2330	* The set bits in the value parameter are reset in the configuration
2331	* register.
2332	*
2333	* RETURN:
2334	* None.
2335	*
2336	*******************************************************************************/
2337	static void ethernet_reset_config_reg (ETH_PORT eth_port_num,
2338	unsigned int value)
2339	{
2340	unsigned int eth_config_reg;
2341
2342	eth_config_reg = MV_REG_READ (MV64360_ETH_PORT_CONFIG_EXTEND_REG
2343	(eth_port_num));
2344	eth_config_reg &= ~value;
2345	MV_REG_WRITE (MV64360_ETH_PORT_CONFIG_EXTEND_REG (eth_port_num),
2346	eth_config_reg);
2347
2348	return;
2349	}
2350	#endif
2351
2352	#if 0 /* Not needed here */
2353	/*******************************************************************************
2354	* ethernet_get_config_reg - Get the port configuration register
2355	*
2356	* DESCRIPTION:
2357	* This function returns the configuration register value of the given
2358	* ethernet port.
2359	*
2360	* INPUT:
2361	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2362	*
2363	* OUTPUT:
2364	* None.
2365	*
2366	* RETURN:
2367	* Port configuration register value.
2368	*
2369	*******************************************************************************/
2370	static unsigned int ethernet_get_config_reg (ETH_PORT eth_port_num)
2371	{
2372	unsigned int eth_config_reg;
2373
2374	eth_config_reg = MV_REG_READ (MV64360_ETH_PORT_CONFIG_EXTEND_REG
2375	(eth_port_num));
2376	return eth_config_reg;
2377	}
2378
2379	#endif
2380
2381	/*******************************************************************************
2382	* eth_port_read_smi_reg - Read PHY registers
2383	*
2384	* DESCRIPTION:
2385	* This routine utilize the SMI interface to interact with the PHY in
2386	* order to perform PHY register read.
2387	*
2388	* INPUT:
2389	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2390	* unsigned int phy_reg PHY register address offset.
2391	* unsigned int *value Register value buffer.
2392	*
2393	* OUTPUT:
2394	* Write the value of a specified PHY register into given buffer.
2395	*
2396	* RETURN:
2397	* false if the PHY is busy or read data is not in valid state.
2398	* true otherwise.
2399	*
2400	*******************************************************************************/
2401	static bool eth_port_read_smi_reg (ETH_PORT eth_port_num,
2402	unsigned int phy_reg, unsigned int *value)
2403	{
2404	unsigned int reg_value;
2405	unsigned int time_out = PHY_BUSY_TIMEOUT;
2406	int phy_addr;
2407
2408	phy_addr = ethernet_phy_get (eth_port_num);
2409	/* printf(" Phy-Port %d has addess %d \n",eth_port_num, phy_addr );*/
2410
2411	/* first check that it is not busy */
2412	do {
2413	reg_value = MV_REG_READ (MV64360_ETH_SMI_REG);
2414	if (time_out-- == 0) {
2415	return false;
2416	}
2417	}
2418	while (reg_value & ETH_SMI_BUSY);
2419
2420	/* not busy */
2421
2422	MV_REG_WRITE (MV64360_ETH_SMI_REG,
2423	(phy_addr << 16) \| (phy_reg << 21) \|
2424	ETH_SMI_OPCODE_READ);
2425
2426	time_out = PHY_BUSY_TIMEOUT; /* initialize the time out var again */
2427
2428	do {
2429	reg_value = MV_REG_READ (MV64360_ETH_SMI_REG);
2430	if (time_out-- == 0) {
2431	return false;
2432	}
2433	}
2434	while ((reg_value & ETH_SMI_READ_VALID) != ETH_SMI_READ_VALID); /* Bit set equ operation done */
2435
2436	/* Wait for the data to update in the SMI register */
2437	#define PHY_UPDATE_TIMEOUT 10000
2438	for (time_out = 0; time_out < PHY_UPDATE_TIMEOUT; time_out++);
2439
2440	reg_value = MV_REG_READ (MV64360_ETH_SMI_REG);
2441
2442	*value = reg_value & 0xffff;
2443
2444	return true;
2445	}
2446
2447	/*******************************************************************************
2448	* eth_port_write_smi_reg - Write to PHY registers
2449	*
2450	* DESCRIPTION:
2451	* This routine utilize the SMI interface to interact with the PHY in
2452	* order to perform writes to PHY registers.
2453	*
2454	* INPUT:
2455	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2456	* unsigned int phy_reg PHY register address offset.
2457	* unsigned int value Register value.
2458	*
2459	* OUTPUT:
2460	* Write the given value to the specified PHY register.
2461	*
2462	* RETURN:
2463	* false if the PHY is busy.
2464	* true otherwise.
2465	*
2466	*******************************************************************************/
2467	static bool eth_port_write_smi_reg (ETH_PORT eth_port_num,
2468	unsigned int phy_reg, unsigned int value)
2469	{
2470	unsigned int reg_value;
2471	unsigned int time_out = PHY_BUSY_TIMEOUT;
2472	int phy_addr;
2473
2474	phy_addr = ethernet_phy_get (eth_port_num);
2475
2476	/* first check that it is not busy */
2477	do {
2478	reg_value = MV_REG_READ (MV64360_ETH_SMI_REG);
2479	if (time_out-- == 0) {
2480	return false;
2481	}
2482	}
2483	while (reg_value & ETH_SMI_BUSY);
2484
2485	/* not busy */
2486	MV_REG_WRITE (MV64360_ETH_SMI_REG,
2487	(phy_addr << 16) \| (phy_reg << 21) \|
2488	ETH_SMI_OPCODE_WRITE \| (value & 0xffff));
2489	return true;
2490	}
2491
2492	/*******************************************************************************
2493	* eth_set_access_control - Config address decode parameters for Ethernet unit
2494	*
2495	* DESCRIPTION:
2496	* This function configures the address decode parameters for the Gigabit
2497	* Ethernet Controller according the given parameters struct.
2498	*
2499	* INPUT:
2500	* ETH_PORT eth_port_num Ethernet Port number. See ETH_PORT enum.
2501	* ETH_WIN_PARAM *param Address decode parameter struct.
2502	*
2503	* OUTPUT:
2504	* An access window is opened using the given access parameters.
2505	*
2506	* RETURN:
2507	* None.
2508	*
2509	*******************************************************************************/
2510	static void eth_set_access_control (ETH_PORT eth_port_num,
2511	ETH_WIN_PARAM * param)
2512	{
2513	unsigned int access_prot_reg;
2514
2515	/* Set access control register */
2516	access_prot_reg = MV_REG_READ (MV64360_ETH_ACCESS_PROTECTION_REG
2517	(eth_port_num));
2518	access_prot_reg &= (~(3 << (param->win * 2))); /* clear window permission */
2519	access_prot_reg \|= (param->access_ctrl << (param->win * 2));
2520	MV_REG_WRITE (MV64360_ETH_ACCESS_PROTECTION_REG (eth_port_num),
2521	access_prot_reg);
2522
2523	/* Set window Size reg (SR) */
2524	MV_REG_WRITE ((MV64360_ETH_SIZE_REG_0 +
2525	(ETH_SIZE_REG_GAP * param->win)),
2526	(((param->size / 0x10000) - 1) << 16));
2527
2528	/* Set window Base address reg (BA) */
2529	MV_REG_WRITE ((MV64360_ETH_BAR_0 + (ETH_BAR_GAP * param->win)),
2530	(param->target \| param->attributes \| param->base_addr));
2531	/* High address remap reg (HARR) */
2532	if (param->win < 4)
2533	MV_REG_WRITE ((MV64360_ETH_HIGH_ADDR_REMAP_REG_0 +
2534	(ETH_HIGH_ADDR_REMAP_REG_GAP * param->win)),
2535	param->high_addr);
2536
2537	/* Base address enable reg (BARER) */
2538	if (param->enable == 1)
2539	MV_RESET_REG_BITS (MV64360_ETH_BASE_ADDR_ENABLE_REG,
2540	(1 << param->win));
2541	else
2542	MV_SET_REG_BITS (MV64360_ETH_BASE_ADDR_ENABLE_REG,
2543	(1 << param->win));
2544	}
2545
2546	/*******************************************************************************
2547	* ether_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
2548	*
2549	* DESCRIPTION:
2550	* This function prepares a Rx chained list of descriptors and packet
2551	* buffers in a form of a ring. The routine must be called after port
2552	* initialization routine and before port start routine.
2553	* The Ethernet SDMA engine uses CPU bus addresses to access the various
2554	* devices in the system (i.e. DRAM). This function uses the ethernet
2555	* struct 'virtual to physical' routine (set by the user) to set the ring
2556	* with physical addresses.
2557	*
2558	* INPUT:
2559	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
2560	* ETH_QUEUE rx_queue Number of Rx queue.
2561	* int rx_desc_num Number of Rx descriptors
2562	* int rx_buff_size Size of Rx buffer
2563	* unsigned int rx_desc_base_addr Rx descriptors memory area base addr.
2564	* unsigned int rx_buff_base_addr Rx buffer memory area base addr.
2565	*
2566	* OUTPUT:
2567	* The routine updates the Ethernet port control struct with information
2568	* regarding the Rx descriptors and buffers.
2569	*
2570	* RETURN:
2571	* false if the given descriptors memory area is not aligned according to
2572	* Ethernet SDMA specifications.
2573	* true otherwise.
2574	*
2575	*******************************************************************************/
2576	static bool ether_init_rx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
2577	ETH_QUEUE rx_queue,
2578	int rx_desc_num,
2579	int rx_buff_size,
2580	unsigned int rx_desc_base_addr,
2581	unsigned int rx_buff_base_addr)
2582	{
2583	ETH_RX_DESC *p_rx_desc;
2584	ETH_RX_DESC p_rx_prev_desc; / pointer to link with the last descriptor */
2585	unsigned int buffer_addr;
2586	int ix; /* a counter */
2587
2588
2589	p_rx_desc = (ETH_RX_DESC *) rx_desc_base_addr;
2590	p_rx_prev_desc = p_rx_desc;
2591	buffer_addr = rx_buff_base_addr;
2592
2593	/* Rx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
2594	if (rx_buff_base_addr & 0xF)
2595	return false;
2596
2597	/* Rx buffers are limited to 64K bytes and Minimum size is 8 bytes */
2598	if ((rx_buff_size < 8) \|\| (rx_buff_size > RX_BUFFER_MAX_SIZE))
2599	return false;
2600
2601	/* Rx buffers must be 64-bit aligned. */
2602	if ((rx_buff_base_addr + rx_buff_size) & 0x7)
2603	return false;
2604
2605	/* initialize the Rx descriptors ring */
2606	for (ix = 0; ix < rx_desc_num; ix++) {
2607	p_rx_desc->buf_size = rx_buff_size;
2608	p_rx_desc->byte_cnt = 0x0000;
2609	p_rx_desc->cmd_sts =
2610	ETH_BUFFER_OWNED_BY_DMA \| ETH_RX_ENABLE_INTERRUPT;
2611	p_rx_desc->next_desc_ptr =
2612	((unsigned int) p_rx_desc) + RX_DESC_ALIGNED_SIZE;
2613	p_rx_desc->buf_ptr = buffer_addr;
2614	p_rx_desc->return_info = 0x00000000;
2615	D_CACHE_FLUSH_LINE (p_rx_desc, 0);
2616	buffer_addr += rx_buff_size;
2617	p_rx_prev_desc = p_rx_desc;
2618	p_rx_desc = (ETH_RX_DESC *)
2619	((unsigned int) p_rx_desc + RX_DESC_ALIGNED_SIZE);
2620	}
2621
2622	/* Closing Rx descriptors ring */
2623	p_rx_prev_desc->next_desc_ptr = (rx_desc_base_addr);
2624	D_CACHE_FLUSH_LINE (p_rx_prev_desc, 0);
2625
2626	/* Save Rx desc pointer to driver struct. */
2627	CURR_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
2628	USED_RFD_SET ((ETH_RX_DESC *) rx_desc_base_addr, rx_queue);
2629
2630	p_eth_port_ctrl->p_rx_desc_area_base[rx_queue] =
2631	(ETH_RX_DESC *) rx_desc_base_addr;
2632	p_eth_port_ctrl->rx_desc_area_size[rx_queue] =
2633	rx_desc_num * RX_DESC_ALIGNED_SIZE;
2634
2635	p_eth_port_ctrl->port_rx_queue_command \|= (1 << rx_queue);
2636
2637	return true;
2638	}
2639
2640	/*******************************************************************************
2641	* ether_init_tx_desc_ring - Curve a Tx chain desc list and buffer in memory.
2642	*
2643	* DESCRIPTION:
2644	* This function prepares a Tx chained list of descriptors and packet
2645	* buffers in a form of a ring. The routine must be called after port
2646	* initialization routine and before port start routine.
2647	* The Ethernet SDMA engine uses CPU bus addresses to access the various
2648	* devices in the system (i.e. DRAM). This function uses the ethernet
2649	* struct 'virtual to physical' routine (set by the user) to set the ring
2650	* with physical addresses.
2651	*
2652	* INPUT:
2653	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
2654	* ETH_QUEUE tx_queue Number of Tx queue.
2655	* int tx_desc_num Number of Tx descriptors
2656	* int tx_buff_size Size of Tx buffer
2657	* unsigned int tx_desc_base_addr Tx descriptors memory area base addr.
2658	* unsigned int tx_buff_base_addr Tx buffer memory area base addr.
2659	*
2660	* OUTPUT:
2661	* The routine updates the Ethernet port control struct with information
2662	* regarding the Tx descriptors and buffers.
2663	*
2664	* RETURN:
2665	* false if the given descriptors memory area is not aligned according to
2666	* Ethernet SDMA specifications.
2667	* true otherwise.
2668	*
2669	*******************************************************************************/
2670	static bool ether_init_tx_desc_ring (ETH_PORT_INFO * p_eth_port_ctrl,
2671	ETH_QUEUE tx_queue,
2672	int tx_desc_num,
2673	int tx_buff_size,
2674	unsigned int tx_desc_base_addr,
2675	unsigned int tx_buff_base_addr)
2676	{
2677
2678	ETH_TX_DESC *p_tx_desc;
2679	ETH_TX_DESC *p_tx_prev_desc;
2680	unsigned int buffer_addr;
2681	int ix; /* a counter */
2682
2683
2684	/* save the first desc pointer to link with the last descriptor */
2685	p_tx_desc = (ETH_TX_DESC *) tx_desc_base_addr;
2686	p_tx_prev_desc = p_tx_desc;
2687	buffer_addr = tx_buff_base_addr;
2688
2689	/* Tx desc Must be 4LW aligned (i.e. Descriptor_Address[3:0]=0000). */
2690	if (tx_buff_base_addr & 0xF)
2691	return false;
2692
2693	/* Tx buffers are limited to 64K bytes and Minimum size is 8 bytes */
2694	if ((tx_buff_size > TX_BUFFER_MAX_SIZE)
2695	\|\| (tx_buff_size < TX_BUFFER_MIN_SIZE))
2696	return false;
2697
2698	/* Initialize the Tx descriptors ring */
2699	for (ix = 0; ix < tx_desc_num; ix++) {
2700	p_tx_desc->byte_cnt = 0x0000;
2701	p_tx_desc->l4i_chk = 0x0000;
2702	p_tx_desc->cmd_sts = 0x00000000;
2703	p_tx_desc->next_desc_ptr =
2704	((unsigned int) p_tx_desc) + TX_DESC_ALIGNED_SIZE;
2705
2706	p_tx_desc->buf_ptr = buffer_addr;
2707	p_tx_desc->return_info = 0x00000000;
2708	D_CACHE_FLUSH_LINE (p_tx_desc, 0);
2709	buffer_addr += tx_buff_size;
2710	p_tx_prev_desc = p_tx_desc;
2711	p_tx_desc = (ETH_TX_DESC *)
2712	((unsigned int) p_tx_desc + TX_DESC_ALIGNED_SIZE);
2713
2714	}
2715	/* Closing Tx descriptors ring */
2716	p_tx_prev_desc->next_desc_ptr = tx_desc_base_addr;
2717	D_CACHE_FLUSH_LINE (p_tx_prev_desc, 0);
2718	/* Set Tx desc pointer in driver struct. */
2719	CURR_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
2720	USED_TFD_SET ((ETH_TX_DESC *) tx_desc_base_addr, tx_queue);
2721
2722	/* Init Tx ring base and size parameters */
2723	p_eth_port_ctrl->p_tx_desc_area_base[tx_queue] =
2724	(ETH_TX_DESC *) tx_desc_base_addr;
2725	p_eth_port_ctrl->tx_desc_area_size[tx_queue] =
2726	(tx_desc_num * TX_DESC_ALIGNED_SIZE);
2727
2728	/* Add the queue to the list of Tx queues of this port */
2729	p_eth_port_ctrl->port_tx_queue_command \|= (1 << tx_queue);
2730
2731	return true;
2732	}
2733
2734	/*******************************************************************************
2735	* eth_port_send - Send an Ethernet packet
2736	*
2737	* DESCRIPTION:
2738	* This routine send a given packet described by p_pktinfo parameter. It
2739	* supports transmitting of a packet spaned over multiple buffers. The
2740	* routine updates 'curr' and 'first' indexes according to the packet
2741	* segment passed to the routine. In case the packet segment is first,
2742	* the 'first' index is update. In any case, the 'curr' index is updated.
2743	* If the routine get into Tx resource error it assigns 'curr' index as
2744	* 'first'. This way the function can abort Tx process of multiple
2745	* descriptors per packet.
2746	*
2747	* INPUT:
2748	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
2749	* ETH_QUEUE tx_queue Number of Tx queue.
2750	* PKT_INFO *p_pkt_info User packet buffer.
2751	*
2752	* OUTPUT:
2753	* Tx ring 'curr' and 'first' indexes are updated.
2754	*
2755	* RETURN:
2756	* ETH_QUEUE_FULL in case of Tx resource error.
2757	* ETH_ERROR in case the routine can not access Tx desc ring.
2758	* ETH_QUEUE_LAST_RESOURCE if the routine uses the last Tx resource.
2759	* ETH_OK otherwise.
2760	*
2761	*******************************************************************************/
2762	static ETH_FUNC_RET_STATUS eth_port_send (ETH_PORT_INFO * p_eth_port_ctrl,
2763	ETH_QUEUE tx_queue,
2764	PKT_INFO * p_pkt_info)
2765	{
2766	volatile ETH_TX_DESC *p_tx_desc_first;
2767	volatile ETH_TX_DESC *p_tx_desc_curr;
2768	volatile ETH_TX_DESC *p_tx_next_desc_curr;
2769	volatile ETH_TX_DESC *p_tx_desc_used;
2770	unsigned int command_status;
2771
2772	/* Do not process Tx ring in case of Tx ring resource error */
2773	if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
2774	return ETH_QUEUE_FULL;
2775
2776	/* Get the Tx Desc ring indexes */
2777	CURR_TFD_GET (p_tx_desc_curr, tx_queue);
2778	USED_TFD_GET (p_tx_desc_used, tx_queue);
2779
2780	if (p_tx_desc_curr == NULL)
2781	return ETH_ERROR;
2782
2783	/* The following parameters are used to save readings from memory */
2784	p_tx_next_desc_curr = TX_NEXT_DESC_PTR (p_tx_desc_curr, tx_queue);
2785	command_status = p_pkt_info->cmd_sts \| ETH_ZERO_PADDING \| ETH_GEN_CRC;
2786
2787	if (command_status & (ETH_TX_FIRST_DESC)) {
2788	/* Update first desc */
2789	FIRST_TFD_SET (p_tx_desc_curr, tx_queue);
2790	p_tx_desc_first = p_tx_desc_curr;
2791	} else {
2792	FIRST_TFD_GET (p_tx_desc_first, tx_queue);
2793	command_status \|= ETH_BUFFER_OWNED_BY_DMA;
2794	}
2795
2796	/* Buffers with a payload smaller than 8 bytes must be aligned to 64-bit */
2797	/* boundary. We use the memory allocated for Tx descriptor. This memory */
2798	/* located in TX_BUF_OFFSET_IN_DESC offset within the Tx descriptor. */
2799	if (p_pkt_info->byte_cnt <= 8) {
2800	printf ("You have failed in the < 8 bytes errata - fixme\n"); /* RABEEH - TBD */
2801	return ETH_ERROR;
2802
2803	p_tx_desc_curr->buf_ptr =
2804	(unsigned int) p_tx_desc_curr + TX_BUF_OFFSET_IN_DESC;
2805	eth_b_copy (p_pkt_info->buf_ptr, p_tx_desc_curr->buf_ptr,
2806	p_pkt_info->byte_cnt);
2807	} else
2808	p_tx_desc_curr->buf_ptr = p_pkt_info->buf_ptr;
2809
2810	p_tx_desc_curr->byte_cnt = p_pkt_info->byte_cnt;
2811	p_tx_desc_curr->return_info = p_pkt_info->return_info;
2812
2813	if (p_pkt_info->cmd_sts & (ETH_TX_LAST_DESC)) {
2814	/* Set last desc with DMA ownership and interrupt enable. */
2815	p_tx_desc_curr->cmd_sts = command_status \|
2816	ETH_BUFFER_OWNED_BY_DMA \| ETH_TX_ENABLE_INTERRUPT;
2817
2818	if (p_tx_desc_curr != p_tx_desc_first)
2819	p_tx_desc_first->cmd_sts \|= ETH_BUFFER_OWNED_BY_DMA;
2820
2821	/* Flush CPU pipe */
2822
2823	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
2824	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_first, 0);
2825	CPU_PIPE_FLUSH;
2826
2827	/* Apply send command */
2828	ETH_ENABLE_TX_QUEUE (tx_queue, p_eth_port_ctrl->port_num);
2829
2830	/* Finish Tx packet. Update first desc in case of Tx resource error */
2831	p_tx_desc_first = p_tx_next_desc_curr;
2832	FIRST_TFD_SET (p_tx_desc_first, tx_queue);
2833
2834	} else {
2835	p_tx_desc_curr->cmd_sts = command_status;
2836	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_curr, 0);
2837	}
2838
2839	/* Check for ring index overlap in the Tx desc ring */
2840	if (p_tx_next_desc_curr == p_tx_desc_used) {
2841	/* Update the current descriptor */
2842	CURR_TFD_SET (p_tx_desc_first, tx_queue);
2843
2844	p_eth_port_ctrl->tx_resource_err[tx_queue] = true;
2845	return ETH_QUEUE_LAST_RESOURCE;
2846	} else {
2847	/* Update the current descriptor */
2848	CURR_TFD_SET (p_tx_next_desc_curr, tx_queue);
2849	return ETH_OK;
2850	}
2851	}
2852
2853	/*******************************************************************************
2854	* eth_tx_return_desc - Free all used Tx descriptors
2855	*
2856	* DESCRIPTION:
2857	* This routine returns the transmitted packet information to the caller.
2858	* It uses the 'first' index to support Tx desc return in case a transmit
2859	* of a packet spanned over multiple buffer still in process.
2860	* In case the Tx queue was in "resource error" condition, where there are
2861	* no available Tx resources, the function resets the resource error flag.
2862	*
2863	* INPUT:
2864	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
2865	* ETH_QUEUE tx_queue Number of Tx queue.
2866	* PKT_INFO *p_pkt_info User packet buffer.
2867	*
2868	* OUTPUT:
2869	* Tx ring 'first' and 'used' indexes are updated.
2870	*
2871	* RETURN:
2872	* ETH_ERROR in case the routine can not access Tx desc ring.
2873	* ETH_RETRY in case there is transmission in process.
2874	* ETH_END_OF_JOB if the routine has nothing to release.
2875	* ETH_OK otherwise.
2876	*
2877	*******************************************************************************/
2878	static ETH_FUNC_RET_STATUS eth_tx_return_desc (ETH_PORT_INFO *
2879	p_eth_port_ctrl,
2880	ETH_QUEUE tx_queue,
2881	PKT_INFO * p_pkt_info)
2882	{
2883	volatile ETH_TX_DESC *p_tx_desc_used = NULL;
2884	volatile ETH_TX_DESC *p_tx_desc_first = NULL;
2885	unsigned int command_status;
2886
2887
2888	/* Get the Tx Desc ring indexes */
2889	USED_TFD_GET (p_tx_desc_used, tx_queue);
2890	FIRST_TFD_GET (p_tx_desc_first, tx_queue);
2891
2892
2893	/* Sanity check */
2894	if (p_tx_desc_used == NULL)
2895	return ETH_ERROR;
2896
2897	command_status = p_tx_desc_used->cmd_sts;
2898
2899	/* Still transmitting... */
2900	if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
2901	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
2902	return ETH_RETRY;
2903	}
2904
2905	/* Stop release. About to overlap the current available Tx descriptor */
2906	if ((p_tx_desc_used == p_tx_desc_first) &&
2907	(p_eth_port_ctrl->tx_resource_err[tx_queue] == false)) {
2908	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
2909	return ETH_END_OF_JOB;
2910	}
2911
2912	/* Pass the packet information to the caller */
2913	p_pkt_info->cmd_sts = command_status;
2914	p_pkt_info->return_info = p_tx_desc_used->return_info;
2915	p_tx_desc_used->return_info = 0;
2916
2917	/* Update the next descriptor to release. */
2918	USED_TFD_SET (TX_NEXT_DESC_PTR (p_tx_desc_used, tx_queue), tx_queue);
2919
2920	/* Any Tx return cancels the Tx resource error status */
2921	if (p_eth_port_ctrl->tx_resource_err[tx_queue] == true)
2922	p_eth_port_ctrl->tx_resource_err[tx_queue] = false;
2923
2924	D_CACHE_FLUSH_LINE ((unsigned int) p_tx_desc_used, 0);
2925
2926	return ETH_OK;
2927
2928	}
2929
2930	/*******************************************************************************
2931	* eth_port_receive - Get received information from Rx ring.
2932	*
2933	* DESCRIPTION:
2934	* This routine returns the received data to the caller. There is no
2935	* data copying during routine operation. All information is returned
2936	* using pointer to packet information struct passed from the caller.
2937	* If the routine exhausts Rx ring resources then the resource error flag
2938	* is set.
2939	*
2940	* INPUT:
2941	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
2942	* ETH_QUEUE rx_queue Number of Rx queue.
2943	* PKT_INFO *p_pkt_info User packet buffer.
2944	*
2945	* OUTPUT:
2946	* Rx ring current and used indexes are updated.
2947	*
2948	* RETURN:
2949	* ETH_ERROR in case the routine can not access Rx desc ring.
2950	* ETH_QUEUE_FULL if Rx ring resources are exhausted.
2951	* ETH_END_OF_JOB if there is no received data.
2952	* ETH_OK otherwise.
2953	*
2954	*******************************************************************************/
2955	static ETH_FUNC_RET_STATUS eth_port_receive (ETH_PORT_INFO * p_eth_port_ctrl,
2956	ETH_QUEUE rx_queue,
2957	PKT_INFO * p_pkt_info)
2958	{
2959	volatile ETH_RX_DESC *p_rx_curr_desc;
2960	volatile ETH_RX_DESC *p_rx_next_curr_desc;
2961	volatile ETH_RX_DESC *p_rx_used_desc;
2962	unsigned int command_status;
2963
2964	/* Do not process Rx ring in case of Rx ring resource error */
2965	if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true) {
2966	printf ("\nRx Queue is full ...\n");
2967	return ETH_QUEUE_FULL;
2968	}
2969
2970	/* Get the Rx Desc ring 'curr and 'used' indexes */
2971	CURR_RFD_GET (p_rx_curr_desc, rx_queue);
2972	USED_RFD_GET (p_rx_used_desc, rx_queue);
2973
2974	/* Sanity check */
2975	if (p_rx_curr_desc == NULL)
2976	return ETH_ERROR;
2977
2978	/* The following parameters are used to save readings from memory */
2979	p_rx_next_curr_desc = RX_NEXT_DESC_PTR (p_rx_curr_desc, rx_queue);
2980	command_status = p_rx_curr_desc->cmd_sts;
2981
2982	/* Nothing to receive... */
2983	if (command_status & (ETH_BUFFER_OWNED_BY_DMA)) {
2984	/* DP(printf("Rx: command_status: %08x\n", command_status)); */
2985	D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
2986	/* DP(printf("\nETH_END_OF_JOB ...\n"));*/
2987	return ETH_END_OF_JOB;
2988	}
2989
2990	p_pkt_info->byte_cnt = (p_rx_curr_desc->byte_cnt) - RX_BUF_OFFSET;
2991	p_pkt_info->cmd_sts = command_status;
2992	p_pkt_info->buf_ptr = (p_rx_curr_desc->buf_ptr) + RX_BUF_OFFSET;
2993	p_pkt_info->return_info = p_rx_curr_desc->return_info;
2994	p_pkt_info->l4i_chk = p_rx_curr_desc->buf_size; /* IP fragment indicator */
2995
2996	/* Clean the return info field to indicate that the packet has been */
2997	/* moved to the upper layers */
2998	p_rx_curr_desc->return_info = 0;
2999
3000	/* Update 'curr' in data structure */
3001	CURR_RFD_SET (p_rx_next_curr_desc, rx_queue);
3002
3003	/* Rx descriptors resource exhausted. Set the Rx ring resource error flag */
3004	if (p_rx_next_curr_desc == p_rx_used_desc)
3005	p_eth_port_ctrl->rx_resource_err[rx_queue] = true;
3006
3007	D_CACHE_FLUSH_LINE ((unsigned int) p_rx_curr_desc, 0);
3008	CPU_PIPE_FLUSH;
3009	return ETH_OK;
3010	}
3011
3012	/*******************************************************************************
3013	* eth_rx_return_buff - Returns a Rx buffer back to the Rx ring.
3014	*
3015	* DESCRIPTION:
3016	* This routine returns a Rx buffer back to the Rx ring. It retrieves the
3017	* next 'used' descriptor and attached the returned buffer to it.
3018	* In case the Rx ring was in "resource error" condition, where there are
3019	* no available Rx resources, the function resets the resource error flag.
3020	*
3021	* INPUT:
3022	* ETH_PORT_INFO *p_eth_port_ctrl Ethernet Port Control srtuct.
3023	* ETH_QUEUE rx_queue Number of Rx queue.
3024	* PKT_INFO *p_pkt_info Information on the returned buffer.
3025	*
3026	* OUTPUT:
3027	* New available Rx resource in Rx descriptor ring.
3028	*
3029	* RETURN:
3030	* ETH_ERROR in case the routine can not access Rx desc ring.
3031	* ETH_OK otherwise.
3032	*
3033	*******************************************************************************/
3034	static ETH_FUNC_RET_STATUS eth_rx_return_buff (ETH_PORT_INFO *
3035	p_eth_port_ctrl,
3036	ETH_QUEUE rx_queue,
3037	PKT_INFO * p_pkt_info)
3038	{
3039	volatile ETH_RX_DESC p_used_rx_desc; / Where to return Rx resource */
3040
3041	/* Get 'used' Rx descriptor */
3042	USED_RFD_GET (p_used_rx_desc, rx_queue);
3043
3044	/* Sanity check */
3045	if (p_used_rx_desc == NULL)
3046	return ETH_ERROR;
3047
3048	p_used_rx_desc->buf_ptr = p_pkt_info->buf_ptr;
3049	p_used_rx_desc->return_info = p_pkt_info->return_info;
3050	p_used_rx_desc->byte_cnt = p_pkt_info->byte_cnt;
3051	p_used_rx_desc->buf_size = MV64360_RX_BUFFER_SIZE; /* Reset Buffer size */
3052
3053	/* Flush the write pipe */
3054	CPU_PIPE_FLUSH;
3055
3056	/* Return the descriptor to DMA ownership */
3057	p_used_rx_desc->cmd_sts =
3058	ETH_BUFFER_OWNED_BY_DMA \| ETH_RX_ENABLE_INTERRUPT;
3059
3060	/* Flush descriptor and CPU pipe */
3061	D_CACHE_FLUSH_LINE ((unsigned int) p_used_rx_desc, 0);
3062	CPU_PIPE_FLUSH;
3063
3064	/* Move the used descriptor pointer to the next descriptor */
3065	USED_RFD_SET (RX_NEXT_DESC_PTR (p_used_rx_desc, rx_queue), rx_queue);
3066
3067	/* Any Rx return cancels the Rx resource error status */
3068	if (p_eth_port_ctrl->rx_resource_err[rx_queue] == true)
3069	p_eth_port_ctrl->rx_resource_err[rx_queue] = false;
3070
3071	return ETH_OK;
3072	}
3073
3074	/*******************************************************************************
3075	* eth_port_set_rx_coal - Sets coalescing interrupt mechanism on RX path
3076	*
3077	* DESCRIPTION:
3078	* This routine sets the RX coalescing interrupt mechanism parameter.
3079	* This parameter is a timeout counter, that counts in 64 t_clk
3080	* chunks ; that when timeout event occurs a maskable interrupt
3081	* occurs.
3082	* The parameter is calculated using the tClk of the MV-643xx chip
3083	* , and the required delay of the interrupt in usec.
3084	*
3085	* INPUT:
3086	* ETH_PORT eth_port_num Ethernet port number
3087	* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
3088	* unsigned int delay Delay in usec
3089	*
3090	* OUTPUT:
3091	* Interrupt coalescing mechanism value is set in MV-643xx chip.
3092	*
3093	* RETURN:
3094	* The interrupt coalescing value set in the gigE port.
3095	*
3096	*******************************************************************************/
3097	#if 0 /* FIXME */
3098	static unsigned int eth_port_set_rx_coal (ETH_PORT eth_port_num,
3099	unsigned int t_clk,
3100	unsigned int delay)
3101	{
3102	unsigned int coal;
3103
3104	coal = ((t_clk / 1000000) * delay) / 64;
3105	/* Set RX Coalescing mechanism */
3106	MV_REG_WRITE (MV64360_ETH_SDMA_CONFIG_REG (eth_port_num),
3107	((coal & 0x3fff) << 8) \|
3108	(MV_REG_READ
3109	(MV64360_ETH_SDMA_CONFIG_REG (eth_port_num))
3110	& 0xffc000ff));
3111	return coal;
3112	}
3113
3114	#endif
3115	/*******************************************************************************
3116	* eth_port_set_tx_coal - Sets coalescing interrupt mechanism on TX path
3117	*
3118	* DESCRIPTION:
3119	* This routine sets the TX coalescing interrupt mechanism parameter.
3120	* This parameter is a timeout counter, that counts in 64 t_clk
3121	* chunks ; that when timeout event occurs a maskable interrupt
3122	* occurs.
3123	* The parameter is calculated using the t_cLK frequency of the
3124	* MV-643xx chip and the required delay in the interrupt in uSec
3125	*
3126	* INPUT:
3127	* ETH_PORT eth_port_num Ethernet port number
3128	* unsigned int t_clk t_clk of the MV-643xx chip in HZ units
3129	* unsigned int delay Delay in uSeconds
3130	*
3131	* OUTPUT:
3132	* Interrupt coalescing mechanism value is set in MV-643xx chip.
3133	*
3134	* RETURN:
3135	* The interrupt coalescing value set in the gigE port.
3136	*
3137	*******************************************************************************/
3138	#if 0 /* FIXME */
3139	static unsigned int eth_port_set_tx_coal (ETH_PORT eth_port_num,
3140	unsigned int t_clk,
3141	unsigned int delay)
3142	{
3143	unsigned int coal;
3144
3145	coal = ((t_clk / 1000000) * delay) / 64;
3146	/* Set TX Coalescing mechanism */
3147	MV_REG_WRITE (MV64360_ETH_TX_FIFO_URGENT_THRESHOLD_REG (eth_port_num),
3148	coal << 4);
3149	return coal;
3150	}
3151	#endif
3152
3153	/*******************************************************************************
3154	* eth_b_copy - Copy bytes from source to destination
3155	*
3156	* DESCRIPTION:
3157	* This function supports the eight bytes limitation on Tx buffer size.
3158	* The routine will zero eight bytes starting from the destination address
3159	* followed by copying bytes from the source address to the destination.
3160	*
3161	* INPUT:
3162	* unsigned int src_addr 32 bit source address.
3163	* unsigned int dst_addr 32 bit destination address.
3164	* int byte_count Number of bytes to copy.
3165	*
3166	* OUTPUT:
3167	* See description.
3168	*
3169	* RETURN:
3170	* None.
3171	*
3172	*******************************************************************************/
3173	static void eth_b_copy (unsigned int src_addr, unsigned int dst_addr,
3174	int byte_count)
3175	{
3176	/* Zero the dst_addr area */
3177	(unsigned int ) dst_addr = 0x0;
3178
3179	while (byte_count != 0) {
3180	(char ) dst_addr = (char ) src_addr;
3181	dst_addr++;
3182	src_addr++;
3183	byte_count--;
3184	}
3185	}

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source: SVN/rincon/u-boot/board/esd/cpci750/mv_eth.c @ 55

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