1 // SPDX-License-Identifier: GPL-2.0
2 /* $Date: 2006/04/28 19:20:06 $ $RCSfile: vsc7326.c,v $ $Revision: 1.19 $ */
3 
4 /* Driver for Vitesse VSC7326 (Schaumburg) MAC */
5 
6 #include "gmac.h"
7 #include "elmer0.h"
8 #include "vsc7326_reg.h"
9 
10 /* Update fast changing statistics every 15 seconds */
11 #define STATS_TICK_SECS 15
12 /* 30 minutes for full statistics update */
13 #define MAJOR_UPDATE_TICKS (1800 / STATS_TICK_SECS)
14 
15 /* The egress WM value 0x01a01fff should be used only when the
16  * interface is down (MAC port disabled). This is a workaround
17  * for disabling the T2/MAC flow-control. When the interface is
18  * enabled, the WM value should be set to 0x014a03F0.
19  */
20 #define WM_DISABLE	0x01a01fff
21 #define WM_ENABLE	0x014a03F0
22 
23 struct init_table {
24 	u32 addr;
25 	u32 data;
26 };
27 
28 struct _cmac_instance {
29 	u32 index;
30 	u32 ticks;
31 };
32 
33 #define INITBLOCK_SLEEP	0xffffffff
34 
35 static void vsc_read(adapter_t *adapter, u32 addr, u32 *val)
36 {
37 	u32 status, vlo, vhi;
38 	int i;
39 
40 	spin_lock_bh(&adapter->mac_lock);
41 	t1_tpi_read(adapter, (addr << 2) + 4, &vlo);
42 	i = 0;
43 	do {
44 		t1_tpi_read(adapter, (REG_LOCAL_STATUS << 2) + 4, &vlo);
45 		t1_tpi_read(adapter, REG_LOCAL_STATUS << 2, &vhi);
46 		status = (vhi << 16) | vlo;
47 		i++;
48 	} while (((status & 1) == 0) && (i < 50));
49 	if (i == 50)
50 		pr_err("Invalid tpi read from MAC, breaking loop.\n");
51 
52 	t1_tpi_read(adapter, (REG_LOCAL_DATA << 2) + 4, &vlo);
53 	t1_tpi_read(adapter, REG_LOCAL_DATA << 2, &vhi);
54 
55 	*val = (vhi << 16) | vlo;
56 
57 	/* pr_err("rd: block: 0x%x  sublock: 0x%x  reg: 0x%x  data: 0x%x\n",
58 		((addr&0xe000)>>13), ((addr&0x1e00)>>9),
59 		((addr&0x01fe)>>1), *val); */
60 	spin_unlock_bh(&adapter->mac_lock);
61 }
62 
63 static void vsc_write(adapter_t *adapter, u32 addr, u32 data)
64 {
65 	spin_lock_bh(&adapter->mac_lock);
66 	t1_tpi_write(adapter, (addr << 2) + 4, data & 0xFFFF);
67 	t1_tpi_write(adapter, addr << 2, (data >> 16) & 0xFFFF);
68 	/* pr_err("wr: block: 0x%x  sublock: 0x%x  reg: 0x%x  data: 0x%x\n",
69 		((addr&0xe000)>>13), ((addr&0x1e00)>>9),
70 		((addr&0x01fe)>>1), data); */
71 	spin_unlock_bh(&adapter->mac_lock);
72 }
73 
74 /* Hard reset the MAC.  This wipes out *all* configuration. */
75 static void vsc7326_full_reset(adapter_t* adapter)
76 {
77 	u32 val;
78 	u32 result = 0xffff;
79 
80 	t1_tpi_read(adapter, A_ELMER0_GPO, &val);
81 	val &= ~1;
82 	t1_tpi_write(adapter, A_ELMER0_GPO, val);
83 	udelay(2);
84 	val |= 0x1;	/* Enable mac MAC itself */
85 	val |= 0x800;	/* Turn off the red LED */
86 	t1_tpi_write(adapter, A_ELMER0_GPO, val);
87 	mdelay(1);
88 	vsc_write(adapter, REG_SW_RESET, 0x80000001);
89 	do {
90 		mdelay(1);
91 		vsc_read(adapter, REG_SW_RESET, &result);
92 	} while (result != 0x0);
93 }
94 
95 static struct init_table vsc7326_reset[] = {
96 	{      REG_IFACE_MODE, 0x00000000 },
97 	{         REG_CRC_CFG, 0x00000020 },
98 	{   REG_PLL_CLK_SPEED, 0x00050c00 },
99 	{   REG_PLL_CLK_SPEED, 0x00050c00 },
100 	{            REG_MSCH, 0x00002f14 },
101 	{       REG_SPI4_MISC, 0x00040409 },
102 	{     REG_SPI4_DESKEW, 0x00080000 },
103 	{ REG_SPI4_ING_SETUP2, 0x08080004 },
104 	{ REG_SPI4_ING_SETUP0, 0x04111004 },
105 	{ REG_SPI4_EGR_SETUP0, 0x80001a04 },
106 	{ REG_SPI4_ING_SETUP1, 0x02010000 },
107 	{      REG_AGE_INC(0), 0x00000000 },
108 	{      REG_AGE_INC(1), 0x00000000 },
109 	{     REG_ING_CONTROL, 0x0a200011 },
110 	{     REG_EGR_CONTROL, 0xa0010091 },
111 };
112 
113 static struct init_table vsc7326_portinit[4][22] = {
114 	{	/* Port 0 */
115 			/* FIFO setup */
116 		{           REG_DBG(0), 0x000004f0 },
117 		{           REG_HDX(0), 0x00073101 },
118 		{        REG_TEST(0,0), 0x00000022 },
119 		{        REG_TEST(1,0), 0x00000022 },
120 		{  REG_TOP_BOTTOM(0,0), 0x003f0000 },
121 		{  REG_TOP_BOTTOM(1,0), 0x00120000 },
122 		{ REG_HIGH_LOW_WM(0,0), 0x07460757 },
123 		{ REG_HIGH_LOW_WM(1,0), WM_DISABLE },
124 		{   REG_CT_THRHLD(0,0), 0x00000000 },
125 		{   REG_CT_THRHLD(1,0), 0x00000000 },
126 		{         REG_BUCKE(0), 0x0002ffff },
127 		{         REG_BUCKI(0), 0x0002ffff },
128 		{        REG_TEST(0,0), 0x00000020 },
129 		{        REG_TEST(1,0), 0x00000020 },
130 			/* Port config */
131 		{       REG_MAX_LEN(0), 0x00002710 },
132 		{     REG_PORT_FAIL(0), 0x00000002 },
133 		{    REG_NORMALIZER(0), 0x00000a64 },
134 		{        REG_DENORM(0), 0x00000010 },
135 		{     REG_STICK_BIT(0), 0x03baa370 },
136 		{     REG_DEV_SETUP(0), 0x00000083 },
137 		{     REG_DEV_SETUP(0), 0x00000082 },
138 		{      REG_MODE_CFG(0), 0x0200259f },
139 	},
140 	{	/* Port 1 */
141 			/* FIFO setup */
142 		{           REG_DBG(1), 0x000004f0 },
143 		{           REG_HDX(1), 0x00073101 },
144 		{        REG_TEST(0,1), 0x00000022 },
145 		{        REG_TEST(1,1), 0x00000022 },
146 		{  REG_TOP_BOTTOM(0,1), 0x007e003f },
147 		{  REG_TOP_BOTTOM(1,1), 0x00240012 },
148 		{ REG_HIGH_LOW_WM(0,1), 0x07460757 },
149 		{ REG_HIGH_LOW_WM(1,1), WM_DISABLE },
150 		{   REG_CT_THRHLD(0,1), 0x00000000 },
151 		{   REG_CT_THRHLD(1,1), 0x00000000 },
152 		{         REG_BUCKE(1), 0x0002ffff },
153 		{         REG_BUCKI(1), 0x0002ffff },
154 		{        REG_TEST(0,1), 0x00000020 },
155 		{        REG_TEST(1,1), 0x00000020 },
156 			/* Port config */
157 		{       REG_MAX_LEN(1), 0x00002710 },
158 		{     REG_PORT_FAIL(1), 0x00000002 },
159 		{    REG_NORMALIZER(1), 0x00000a64 },
160 		{        REG_DENORM(1), 0x00000010 },
161 		{     REG_STICK_BIT(1), 0x03baa370 },
162 		{     REG_DEV_SETUP(1), 0x00000083 },
163 		{     REG_DEV_SETUP(1), 0x00000082 },
164 		{      REG_MODE_CFG(1), 0x0200259f },
165 	},
166 	{	/* Port 2 */
167 			/* FIFO setup */
168 		{           REG_DBG(2), 0x000004f0 },
169 		{           REG_HDX(2), 0x00073101 },
170 		{        REG_TEST(0,2), 0x00000022 },
171 		{        REG_TEST(1,2), 0x00000022 },
172 		{  REG_TOP_BOTTOM(0,2), 0x00bd007e },
173 		{  REG_TOP_BOTTOM(1,2), 0x00360024 },
174 		{ REG_HIGH_LOW_WM(0,2), 0x07460757 },
175 		{ REG_HIGH_LOW_WM(1,2), WM_DISABLE },
176 		{   REG_CT_THRHLD(0,2), 0x00000000 },
177 		{   REG_CT_THRHLD(1,2), 0x00000000 },
178 		{         REG_BUCKE(2), 0x0002ffff },
179 		{         REG_BUCKI(2), 0x0002ffff },
180 		{        REG_TEST(0,2), 0x00000020 },
181 		{        REG_TEST(1,2), 0x00000020 },
182 			/* Port config */
183 		{       REG_MAX_LEN(2), 0x00002710 },
184 		{     REG_PORT_FAIL(2), 0x00000002 },
185 		{    REG_NORMALIZER(2), 0x00000a64 },
186 		{        REG_DENORM(2), 0x00000010 },
187 		{     REG_STICK_BIT(2), 0x03baa370 },
188 		{     REG_DEV_SETUP(2), 0x00000083 },
189 		{     REG_DEV_SETUP(2), 0x00000082 },
190 		{      REG_MODE_CFG(2), 0x0200259f },
191 	},
192 	{	/* Port 3 */
193 			/* FIFO setup */
194 		{           REG_DBG(3), 0x000004f0 },
195 		{           REG_HDX(3), 0x00073101 },
196 		{        REG_TEST(0,3), 0x00000022 },
197 		{        REG_TEST(1,3), 0x00000022 },
198 		{  REG_TOP_BOTTOM(0,3), 0x00fc00bd },
199 		{  REG_TOP_BOTTOM(1,3), 0x00480036 },
200 		{ REG_HIGH_LOW_WM(0,3), 0x07460757 },
201 		{ REG_HIGH_LOW_WM(1,3), WM_DISABLE },
202 		{   REG_CT_THRHLD(0,3), 0x00000000 },
203 		{   REG_CT_THRHLD(1,3), 0x00000000 },
204 		{         REG_BUCKE(3), 0x0002ffff },
205 		{         REG_BUCKI(3), 0x0002ffff },
206 		{        REG_TEST(0,3), 0x00000020 },
207 		{        REG_TEST(1,3), 0x00000020 },
208 			/* Port config */
209 		{       REG_MAX_LEN(3), 0x00002710 },
210 		{     REG_PORT_FAIL(3), 0x00000002 },
211 		{    REG_NORMALIZER(3), 0x00000a64 },
212 		{        REG_DENORM(3), 0x00000010 },
213 		{     REG_STICK_BIT(3), 0x03baa370 },
214 		{     REG_DEV_SETUP(3), 0x00000083 },
215 		{     REG_DEV_SETUP(3), 0x00000082 },
216 		{      REG_MODE_CFG(3), 0x0200259f },
217 	},
218 };
219 
220 static void run_table(adapter_t *adapter, struct init_table *ib, int len)
221 {
222 	int i;
223 
224 	for (i = 0; i < len; i++) {
225 		if (ib[i].addr == INITBLOCK_SLEEP) {
226 			udelay( ib[i].data );
227 			pr_err("sleep %d us\n",ib[i].data);
228 		} else
229 			vsc_write( adapter, ib[i].addr, ib[i].data );
230 	}
231 }
232 
233 static int bist_rd(adapter_t *adapter, int moduleid, int address)
234 {
235 	int data = 0;
236 	u32 result = 0;
237 
238 	if ((address != 0x0) &&
239 	    (address != 0x1) &&
240 	    (address != 0x2) &&
241 	    (address != 0xd) &&
242 	    (address != 0xe))
243 			pr_err("No bist address: 0x%x\n", address);
244 
245 	data = ((0x00 << 24) | ((address & 0xff) << 16) | (0x00 << 8) |
246 		((moduleid & 0xff) << 0));
247 	vsc_write(adapter, REG_RAM_BIST_CMD, data);
248 
249 	udelay(10);
250 
251 	vsc_read(adapter, REG_RAM_BIST_RESULT, &result);
252 	if ((result & (1 << 9)) != 0x0)
253 		pr_err("Still in bist read: 0x%x\n", result);
254 	else if ((result & (1 << 8)) != 0x0)
255 		pr_err("bist read error: 0x%x\n", result);
256 
257 	return result & 0xff;
258 }
259 
260 static int bist_wr(adapter_t *adapter, int moduleid, int address, int value)
261 {
262 	int data = 0;
263 	u32 result = 0;
264 
265 	if ((address != 0x0) &&
266 	    (address != 0x1) &&
267 	    (address != 0x2) &&
268 	    (address != 0xd) &&
269 	    (address != 0xe))
270 			pr_err("No bist address: 0x%x\n", address);
271 
272 	if (value > 255)
273 		pr_err("Suspicious write out of range value: 0x%x\n", value);
274 
275 	data = ((0x01 << 24) | ((address & 0xff) << 16) | (value << 8) |
276 		((moduleid & 0xff) << 0));
277 	vsc_write(adapter, REG_RAM_BIST_CMD, data);
278 
279 	udelay(5);
280 
281 	vsc_read(adapter, REG_RAM_BIST_CMD, &result);
282 	if ((result & (1 << 27)) != 0x0)
283 		pr_err("Still in bist write: 0x%x\n", result);
284 	else if ((result & (1 << 26)) != 0x0)
285 		pr_err("bist write error: 0x%x\n", result);
286 
287 	return 0;
288 }
289 
290 static int run_bist(adapter_t *adapter, int moduleid)
291 {
292 	/*run bist*/
293 	(void) bist_wr(adapter,moduleid, 0x00, 0x02);
294 	(void) bist_wr(adapter,moduleid, 0x01, 0x01);
295 
296 	return 0;
297 }
298 
299 static int check_bist(adapter_t *adapter, int moduleid)
300 {
301 	int result=0;
302 	int column=0;
303 	/*check bist*/
304 	result = bist_rd(adapter,moduleid, 0x02);
305 	column = ((bist_rd(adapter,moduleid, 0x0e)<<8) +
306 			(bist_rd(adapter,moduleid, 0x0d)));
307 	if ((result & 3) != 0x3)
308 		pr_err("Result: 0x%x  BIST error in ram %d, column: 0x%04x\n",
309 			result, moduleid, column);
310 	return 0;
311 }
312 
313 static int enable_mem(adapter_t *adapter, int moduleid)
314 {
315 	/*enable mem*/
316 	(void) bist_wr(adapter,moduleid, 0x00, 0x00);
317 	return 0;
318 }
319 
320 static int run_bist_all(adapter_t *adapter)
321 {
322 	int port = 0;
323 	u32 val = 0;
324 
325 	vsc_write(adapter, REG_MEM_BIST, 0x5);
326 	vsc_read(adapter, REG_MEM_BIST, &val);
327 
328 	for (port = 0; port < 12; port++)
329 		vsc_write(adapter, REG_DEV_SETUP(port), 0x0);
330 
331 	udelay(300);
332 	vsc_write(adapter, REG_SPI4_MISC, 0x00040409);
333 	udelay(300);
334 
335 	(void) run_bist(adapter,13);
336 	(void) run_bist(adapter,14);
337 	(void) run_bist(adapter,20);
338 	(void) run_bist(adapter,21);
339 	mdelay(200);
340 	(void) check_bist(adapter,13);
341 	(void) check_bist(adapter,14);
342 	(void) check_bist(adapter,20);
343 	(void) check_bist(adapter,21);
344 	udelay(100);
345 	(void) enable_mem(adapter,13);
346 	(void) enable_mem(adapter,14);
347 	(void) enable_mem(adapter,20);
348 	(void) enable_mem(adapter,21);
349 	udelay(300);
350 	vsc_write(adapter, REG_SPI4_MISC, 0x60040400);
351 	udelay(300);
352 	for (port = 0; port < 12; port++)
353 		vsc_write(adapter, REG_DEV_SETUP(port), 0x1);
354 
355 	udelay(300);
356 	vsc_write(adapter, REG_MEM_BIST, 0x0);
357 	mdelay(10);
358 	return 0;
359 }
360 
361 static int mac_intr_handler(struct cmac *mac)
362 {
363 	return 0;
364 }
365 
366 static int mac_intr_enable(struct cmac *mac)
367 {
368 	return 0;
369 }
370 
371 static int mac_intr_disable(struct cmac *mac)
372 {
373 	return 0;
374 }
375 
376 static int mac_intr_clear(struct cmac *mac)
377 {
378 	return 0;
379 }
380 
381 /* Expect MAC address to be in network byte order. */
382 static int mac_set_address(struct cmac* mac, u8 addr[6])
383 {
384 	u32 val;
385 	int port = mac->instance->index;
386 
387 	vsc_write(mac->adapter, REG_MAC_LOW_ADDR(port),
388 		  (addr[3] << 16) | (addr[4] << 8) | addr[5]);
389 	vsc_write(mac->adapter, REG_MAC_HIGH_ADDR(port),
390 		  (addr[0] << 16) | (addr[1] << 8) | addr[2]);
391 
392 	vsc_read(mac->adapter, REG_ING_FFILT_UM_EN, &val);
393 	val &= ~0xf0000000;
394 	vsc_write(mac->adapter, REG_ING_FFILT_UM_EN, val | (port << 28));
395 
396 	vsc_write(mac->adapter, REG_ING_FFILT_MASK0,
397 		  0xffff0000 | (addr[4] << 8) | addr[5]);
398 	vsc_write(mac->adapter, REG_ING_FFILT_MASK1,
399 		  0xffff0000 | (addr[2] << 8) | addr[3]);
400 	vsc_write(mac->adapter, REG_ING_FFILT_MASK2,
401 		  0xffff0000 | (addr[0] << 8) | addr[1]);
402 	return 0;
403 }
404 
405 static int mac_get_address(struct cmac *mac, u8 addr[6])
406 {
407 	u32 addr_lo, addr_hi;
408 	int port = mac->instance->index;
409 
410 	vsc_read(mac->adapter, REG_MAC_LOW_ADDR(port), &addr_lo);
411 	vsc_read(mac->adapter, REG_MAC_HIGH_ADDR(port), &addr_hi);
412 
413 	addr[0] = (u8) (addr_hi >> 16);
414 	addr[1] = (u8) (addr_hi >> 8);
415 	addr[2] = (u8) addr_hi;
416 	addr[3] = (u8) (addr_lo >> 16);
417 	addr[4] = (u8) (addr_lo >> 8);
418 	addr[5] = (u8) addr_lo;
419 	return 0;
420 }
421 
422 /* This is intended to reset a port, not the whole MAC */
423 static int mac_reset(struct cmac *mac)
424 {
425 	int index = mac->instance->index;
426 
427 	run_table(mac->adapter, vsc7326_portinit[index],
428 		  ARRAY_SIZE(vsc7326_portinit[index]));
429 
430 	return 0;
431 }
432 
433 static int mac_set_rx_mode(struct cmac *mac, struct t1_rx_mode *rm)
434 {
435 	u32 v;
436 	int port = mac->instance->index;
437 
438 	vsc_read(mac->adapter, REG_ING_FFILT_UM_EN, &v);
439 	v |= 1 << 12;
440 
441 	if (t1_rx_mode_promisc(rm))
442 		v &= ~(1 << (port + 16));
443 	else
444 		v |= 1 << (port + 16);
445 
446 	vsc_write(mac->adapter, REG_ING_FFILT_UM_EN, v);
447 	return 0;
448 }
449 
450 static int mac_set_mtu(struct cmac *mac, int mtu)
451 {
452 	int port = mac->instance->index;
453 
454 	/* max_len includes header and FCS */
455 	vsc_write(mac->adapter, REG_MAX_LEN(port), mtu + 14 + 4);
456 	return 0;
457 }
458 
459 static int mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex,
460 				   int fc)
461 {
462 	u32 v;
463 	int enable, port = mac->instance->index;
464 
465 	if (speed >= 0 && speed != SPEED_10 && speed != SPEED_100 &&
466 	    speed != SPEED_1000)
467 		return -1;
468 	if (duplex > 0 && duplex != DUPLEX_FULL)
469 		return -1;
470 
471 	if (speed >= 0) {
472 		vsc_read(mac->adapter, REG_MODE_CFG(port), &v);
473 		enable = v & 3;             /* save tx/rx enables */
474 		v &= ~0xf;
475 		v |= 4;                     /* full duplex */
476 		if (speed == SPEED_1000)
477 			v |= 8;             /* GigE */
478 		enable |= v;
479 		vsc_write(mac->adapter, REG_MODE_CFG(port), v);
480 
481 		if (speed == SPEED_1000)
482 			v = 0x82;
483 		else if (speed == SPEED_100)
484 			v = 0x84;
485 		else	/* SPEED_10 */
486 			v = 0x86;
487 		vsc_write(mac->adapter, REG_DEV_SETUP(port), v | 1); /* reset */
488 		vsc_write(mac->adapter, REG_DEV_SETUP(port), v);
489 		vsc_read(mac->adapter, REG_DBG(port), &v);
490 		v &= ~0xff00;
491 		if (speed == SPEED_1000)
492 			v |= 0x400;
493 		else if (speed == SPEED_100)
494 			v |= 0x2000;
495 		else	/* SPEED_10 */
496 			v |= 0xff00;
497 		vsc_write(mac->adapter, REG_DBG(port), v);
498 
499 		vsc_write(mac->adapter, REG_TX_IFG(port),
500 			  speed == SPEED_1000 ? 5 : 0x11);
501 		if (duplex == DUPLEX_HALF)
502 			enable = 0x0;	/* 100 or 10 */
503 		else if (speed == SPEED_1000)
504 			enable = 0xc;
505 		else	/* SPEED_100 or 10 */
506 			enable = 0x4;
507 		enable |= 0x9 << 10;	/* IFG1 */
508 		enable |= 0x6 << 6;	/* IFG2 */
509 		enable |= 0x1 << 4;	/* VLAN */
510 		enable |= 0x3;		/* RX/TX EN */
511 		vsc_write(mac->adapter, REG_MODE_CFG(port), enable);
512 
513 	}
514 
515 	vsc_read(mac->adapter, REG_PAUSE_CFG(port), &v);
516 	v &= 0xfff0ffff;
517 	v |= 0x20000;      /* xon/xoff */
518 	if (fc & PAUSE_RX)
519 		v |= 0x40000;
520 	if (fc & PAUSE_TX)
521 		v |= 0x80000;
522 	if (fc == (PAUSE_RX | PAUSE_TX))
523 		v |= 0x10000;
524 	vsc_write(mac->adapter, REG_PAUSE_CFG(port), v);
525 	return 0;
526 }
527 
528 static int mac_enable(struct cmac *mac, int which)
529 {
530 	u32 val;
531 	int port = mac->instance->index;
532 
533 	/* Write the correct WM value when the port is enabled. */
534 	vsc_write(mac->adapter, REG_HIGH_LOW_WM(1,port), WM_ENABLE);
535 
536 	vsc_read(mac->adapter, REG_MODE_CFG(port), &val);
537 	if (which & MAC_DIRECTION_RX)
538 		val |= 0x2;
539 	if (which & MAC_DIRECTION_TX)
540 		val |= 1;
541 	vsc_write(mac->adapter, REG_MODE_CFG(port), val);
542 	return 0;
543 }
544 
545 static int mac_disable(struct cmac *mac, int which)
546 {
547 	u32 val;
548 	int i, port = mac->instance->index;
549 
550 	/* Reset the port, this also writes the correct WM value */
551 	mac_reset(mac);
552 
553 	vsc_read(mac->adapter, REG_MODE_CFG(port), &val);
554 	if (which & MAC_DIRECTION_RX)
555 		val &= ~0x2;
556 	if (which & MAC_DIRECTION_TX)
557 		val &= ~0x1;
558 	vsc_write(mac->adapter, REG_MODE_CFG(port), val);
559 	vsc_read(mac->adapter, REG_MODE_CFG(port), &val);
560 
561 	/* Clear stats */
562 	for (i = 0; i <= 0x3a; ++i)
563 		vsc_write(mac->adapter, CRA(4, port, i), 0);
564 
565 	/* Clear software counters */
566 	memset(&mac->stats, 0, sizeof(struct cmac_statistics));
567 
568 	return 0;
569 }
570 
571 static void rmon_update(struct cmac *mac, unsigned int addr, u64 *stat)
572 {
573 	u32 v, lo;
574 
575 	vsc_read(mac->adapter, addr, &v);
576 	lo = *stat;
577 	*stat = *stat - lo + v;
578 
579 	if (v == 0)
580 		return;
581 
582 	if (v < lo)
583 		*stat += (1ULL << 32);
584 }
585 
586 static void port_stats_update(struct cmac *mac)
587 {
588 	struct {
589 		unsigned int reg;
590 		unsigned int offset;
591 	} hw_stats[] = {
592 
593 #define HW_STAT(reg, stat_name) \
594 	{ reg, (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL }
595 
596 		/* Rx stats */
597 		HW_STAT(RxUnicast, RxUnicastFramesOK),
598 		HW_STAT(RxMulticast, RxMulticastFramesOK),
599 		HW_STAT(RxBroadcast, RxBroadcastFramesOK),
600 		HW_STAT(Crc, RxFCSErrors),
601 		HW_STAT(RxAlignment, RxAlignErrors),
602 		HW_STAT(RxOversize, RxFrameTooLongErrors),
603 		HW_STAT(RxPause, RxPauseFrames),
604 		HW_STAT(RxJabbers, RxJabberErrors),
605 		HW_STAT(RxFragments, RxRuntErrors),
606 		HW_STAT(RxUndersize, RxRuntErrors),
607 		HW_STAT(RxSymbolCarrier, RxSymbolErrors),
608 		HW_STAT(RxSize1519ToMax, RxJumboFramesOK),
609 
610 		/* Tx stats (skip collision stats as we are full-duplex only) */
611 		HW_STAT(TxUnicast, TxUnicastFramesOK),
612 		HW_STAT(TxMulticast, TxMulticastFramesOK),
613 		HW_STAT(TxBroadcast, TxBroadcastFramesOK),
614 		HW_STAT(TxPause, TxPauseFrames),
615 		HW_STAT(TxUnderrun, TxUnderrun),
616 		HW_STAT(TxSize1519ToMax, TxJumboFramesOK),
617 	}, *p = hw_stats;
618 	unsigned int port = mac->instance->index;
619 	u64 *stats = (u64 *)&mac->stats;
620 	unsigned int i;
621 
622 	for (i = 0; i < ARRAY_SIZE(hw_stats); i++)
623 		rmon_update(mac, CRA(0x4, port, p->reg), stats + p->offset);
624 
625 	rmon_update(mac, REG_TX_OK_BYTES(port), &mac->stats.TxOctetsOK);
626 	rmon_update(mac, REG_RX_OK_BYTES(port), &mac->stats.RxOctetsOK);
627 	rmon_update(mac, REG_RX_BAD_BYTES(port), &mac->stats.RxOctetsBad);
628 }
629 
630 /*
631  * This function is called periodically to accumulate the current values of the
632  * RMON counters into the port statistics.  Since the counters are only 32 bits
633  * some of them can overflow in less than a minute at GigE speeds, so this
634  * function should be called every 30 seconds or so.
635  *
636  * To cut down on reading costs we update only the octet counters at each tick
637  * and do a full update at major ticks, which can be every 30 minutes or more.
638  */
639 static const struct cmac_statistics *mac_update_statistics(struct cmac *mac,
640 							   int flag)
641 {
642 	if (flag == MAC_STATS_UPDATE_FULL ||
643 	    mac->instance->ticks >= MAJOR_UPDATE_TICKS) {
644 		port_stats_update(mac);
645 		mac->instance->ticks = 0;
646 	} else {
647 		int port = mac->instance->index;
648 
649 		rmon_update(mac, REG_RX_OK_BYTES(port),
650 			    &mac->stats.RxOctetsOK);
651 		rmon_update(mac, REG_RX_BAD_BYTES(port),
652 			    &mac->stats.RxOctetsBad);
653 		rmon_update(mac, REG_TX_OK_BYTES(port),
654 			    &mac->stats.TxOctetsOK);
655 		mac->instance->ticks++;
656 	}
657 	return &mac->stats;
658 }
659 
660 static void mac_destroy(struct cmac *mac)
661 {
662 	kfree(mac);
663 }
664 
665 static const struct cmac_ops vsc7326_ops = {
666 	.destroy                  = mac_destroy,
667 	.reset                    = mac_reset,
668 	.interrupt_handler        = mac_intr_handler,
669 	.interrupt_enable         = mac_intr_enable,
670 	.interrupt_disable        = mac_intr_disable,
671 	.interrupt_clear          = mac_intr_clear,
672 	.enable                   = mac_enable,
673 	.disable                  = mac_disable,
674 	.set_mtu                  = mac_set_mtu,
675 	.set_rx_mode              = mac_set_rx_mode,
676 	.set_speed_duplex_fc      = mac_set_speed_duplex_fc,
677 	.statistics_update        = mac_update_statistics,
678 	.macaddress_get           = mac_get_address,
679 	.macaddress_set           = mac_set_address,
680 };
681 
682 static struct cmac *vsc7326_mac_create(adapter_t *adapter, int index)
683 {
684 	struct cmac *mac;
685 	u32 val;
686 	int i;
687 
688 	mac = kzalloc(sizeof(*mac) + sizeof(cmac_instance), GFP_KERNEL);
689 	if (!mac)
690 		return NULL;
691 
692 	mac->ops = &vsc7326_ops;
693 	mac->instance = (cmac_instance *)(mac + 1);
694 	mac->adapter  = adapter;
695 
696 	mac->instance->index = index;
697 	mac->instance->ticks = 0;
698 
699 	i = 0;
700 	do {
701 		u32 vhi, vlo;
702 
703 		vhi = vlo = 0;
704 		t1_tpi_read(adapter, (REG_LOCAL_STATUS << 2) + 4, &vlo);
705 		udelay(1);
706 		t1_tpi_read(adapter, REG_LOCAL_STATUS << 2, &vhi);
707 		udelay(5);
708 		val = (vhi << 16) | vlo;
709 	} while ((++i < 10000) && (val == 0xffffffff));
710 
711 	return mac;
712 }
713 
714 static int vsc7326_mac_reset(adapter_t *adapter)
715 {
716 	vsc7326_full_reset(adapter);
717 	(void) run_bist_all(adapter);
718 	run_table(adapter, vsc7326_reset, ARRAY_SIZE(vsc7326_reset));
719 	return 0;
720 }
721 
722 const struct gmac t1_vsc7326_ops = {
723 	.stats_update_period = STATS_TICK_SECS,
724 	.create              = vsc7326_mac_create,
725 	.reset               = vsc7326_mac_reset,
726 };
727